Dr. Mohammad M. Ansari, MD

Dr. Mohammad M. Ansari, MD Interventional and Structural Cardiologist

Dr. Mohammad M. Ansari, MD, also known professionally as Dr. Mac Ansari, is an interventional and structural cardiologist. He provides adult cardiovascular care with a focus on catheter-based treatment for coronary artery disease, structural heart conditions, and blood vessel disorders.

His advanced training includes cardiovascular disease, interventional cardiology, structural and congenital heart disease, and vascular and endovascular intervention. Current physician profiles associate him with Northwest Houston Heart Center and Houston Methodist Cypress Hospital.

Patients may consult Dr. Ansari for chest discomfort, abnormal cardiac testing, coronary artery narrowing, heart valve disease, peripheral artery disease, reduced blood flow to a limb, or another condition that may require advanced cardiovascular assessment.

A visit with an interventional cardiologist does not automatically mean a catheter procedure or stent will be recommended. The consultation may lead to medication changes, additional testing, risk-factor treatment, continued observation, or an intervention when the expected benefit supports it.

About Dr. Mohammad M. Ansari

Dr. Ansari’s full professional name is Mohammad Mehdi Ansari. He is also widely listed as Mohammad M. Ansari and Mac Ansari.

He joined Northwest Houston Heart Center in September 2024 as a structural and interventional cardiologist. His practice focuses on advanced catheter-based cardiovascular care supported by several specialized fellowship programs.

His clinical background may be relevant to patients needing assessment for:

• Coronary artery disease
• Chest pain and angina
• Abnormal stress-test results
• Heart attack treatment and follow-up
• Cardiac catheterization
• Coronary angioplasty and stent placement
• Structural heart disease
• Aortic valve stenosis
• Heart valve treatment planning
• Congenital openings within the heart
• Peripheral artery disease
• Reduced circulation in the legs
• Chronic limb-threatening ischemia
• Complex vascular intervention
• High blood pressure
• High cholesterol
• Heart failure
• Cardiovascular risk assessment

Patients comparing specialists in this field can review other cardiology doctors listed through Doctiplus.

Education and Medical Training

Training area	Institution	Details
Medical education	Dow Medical College, University of Karachi	Medical degree
Residency	Beth Israel Medical Center	Internal medicine
Research fellowship	Tufts University School of Medicine	Cardiovascular research, 2009 to 2010
Fellowship	NewYork-Presbyterian Hospital, Weill Cornell Medical College	Cardiovascular disease, 2010 to 2013
Advanced fellowship	University of Miami and Jackson Health System	Interventional cardiology, 2013 to 2014
Advanced fellowship	Lenox Hill Heart and Vascular Institute	Structural and congenital heart disease, 2014 to 2015
Advanced fellowship	University of Michigan Health	Advanced vascular and endovascular innovation, 2015 to 2016
Board certification	American Board of Internal Medicine	Internal medicine and cardiovascular disease

Professional biographies identify Dow Medical College as Dr. Ansari’s medical school and Beth Israel Medical Center as the location of his internal medicine residency. His later fellowship history is listed in current professional certification and training records.

This training pathway gave him experience across several connected areas of cardiovascular medicine.

Internal medicine residency provides broad preparation in adult health, including diabetes, kidney disease, infection, respiratory illness, medication management, and the effects these conditions may have on cardiovascular treatment.

Cardiovascular disease fellowship focuses on heart disease diagnosis, imaging, stress testing, heart failure, valve disorders, abnormal heart rhythms, and long-term medical treatment.

Interventional cardiology training adds experience in catheterization, coronary angiography, balloon angioplasty, coronary stents, and the management of selected cardiovascular emergencies.

Structural heart and advanced vascular fellowships provide additional preparation for valve conditions, congenital structural abnormalities, complex artery disease, and specialized endovascular procedures.

Board Certification and Professional Credentials

Current professional records identify Dr. Ansari as certified by the American Board of Internal Medicine in:

• Internal medicine
• Cardiovascular disease

His qualifications also include fellowship training in interventional cardiology, structural and congenital heart disease, and advanced vascular intervention.

His professional credentials include:

• MD, meaning Doctor of Medicine
• Internal medicine residency training
• Cardiovascular disease fellowship training
• Interventional cardiology fellowship training
• Structural heart fellowship training
• Advanced vascular and endovascular training
• Board certification in internal medicine
• Board certification in cardiovascular disease
• Experience in cardiovascular research and physician education

Board certification is separate from medical licensing. A medical license permits a doctor to practice, while board certification reflects formal education, supervised training, and professional assessment within a defined specialty.

Previous Academic and Clinical Leadership

Before joining Northwest Houston Heart Center, Dr. Ansari worked with the Texas Tech University Health Sciences Center in Lubbock.

Professional and academic records identify previous roles involving:

• Cardiac catheterization laboratory leadership
• Structural heart services
• Clinical cardiovascular research
• Peripheral artery disease treatment
• Physician education
• Multidisciplinary limb-preservation care

He previously served as a clinical research vice chair and cardiac catheterization laboratory director. Texas Tech also identified him as director of a center focused on peripheral artery disease and chronic limb-threatening ischemia.

These were previous appointments. Patients needing confirmation of a current academic or leadership title should contact the relevant institution directly.

What an Interventional Cardiologist Does

An interventional cardiologist diagnoses and treats certain heart and circulation conditions using thin, flexible tubes called catheters.

A catheter is usually inserted through a blood vessel in the wrist or groin and guided toward the heart or another affected artery.

Catheter-based procedures may be used to:

• Examine coronary arteries
• Measure pressure inside the heart
• Assess blood flow
• Investigate abnormal cardiac tests
• Open a narrowed coronary artery
• Place a coronary or vascular stent
• Treat selected heart valve conditions
• Close certain abnormal openings in the heart
• Restore circulation through a narrowed peripheral artery

Cardiac catheterization can be used for diagnosis, treatment, or both. It allows doctors to examine the heart closely and complete selected procedures without conventional open surgery.

What a Structural Cardiologist Does

Structural cardiology focuses on physical abnormalities involving the heart’s valves, walls, chambers, and connected blood vessels.

Conditions may include:

• Aortic valve stenosis
• Mitral or tricuspid valve disease
• Atrial septal defect
• Patent foramen ovale
• Structural changes after an earlier operation
• Selected abnormalities present from birth
• Problems involving artificial heart valves
• Other conditions affecting blood movement through the heart

Not every structural heart condition requires treatment. Some can be monitored with regular imaging. Others may require medication, open surgery, or a catheter-based procedure.

Structural heart decisions often involve a team that may include an interventional cardiologist, cardiac surgeon, imaging cardiologist, anesthesiologist, neurologist, or another specialist.

Coronary Artery Disease

Coronary artery disease develops when the arteries supplying the heart cannot carry enough oxygen-rich blood to the heart muscle.

This commonly happens because plaque builds up inside the arteries.

Possible symptoms include:

• Chest pressure or tightness
• Shortness of breath
• Reduced exercise ability
• Discomfort in the arm, jaw, shoulder, neck, or back
• Unusual tiredness
• Sweating
• Nausea during activity
• Symptoms triggered by physical or emotional stress

Some people have few clear symptoms despite significant coronary narrowing.

Evaluation may include:

• Medical and family history
• Blood pressure assessment
• Cholesterol and blood sugar testing
• Electrocardiogram
• Echocardiogram
• Exercise or medication stress testing
• Nuclear cardiac imaging
• Coronary CT imaging
• Cardiac catheterization

Treatment may involve medication, cardiovascular risk management, angioplasty, stent placement, or coronary bypass surgery. The decision depends on the location and severity of the narrowing, symptoms, heart function, other medical conditions, and previous treatment.

Patients with unexplained chest pressure may also read about a tight chest feeling and when it may be serious.

Cardiac Catheterization and Coronary Angiography

Cardiac catheterization allows a cardiologist to gather detailed information about the coronary arteries, heart pressures, blood flow, and selected structural conditions.

During coronary angiography, contrast material is introduced so the coronary arteries can be seen on specialized X-ray images.

The procedure may be considered when:

• Chest symptoms suggest reduced heart blood flow
• A stress test is abnormal
• A heart attack is suspected
• Symptoms continue despite medication
• Previous coronary treatment needs assessment
• A structural heart procedure is being planned
• Other tests have not provided a clear diagnosis

The result may show that medication and monitoring are sufficient. It may also identify narrowing that could benefit from angioplasty, stenting, bypass surgery, or another form of care.

Patients should tell the medical team about kidney disease, contrast reactions, bleeding problems, diabetes medicines, and every prescribed blood thinner before the procedure.

Coronary Angioplasty and Stent Placement

Percutaneous coronary intervention, commonly called PCI or coronary angioplasty, is used to open a narrowed or blocked coronary artery.

A small balloon may be positioned in the narrowed area and inflated. A mesh tube called a stent may then be inserted to help keep the artery open.

PCI may be considered for:

• A heart attack caused by a blocked artery
• Continuing angina despite medical treatment
• Significant coronary artery narrowing
• Reduced blood flow found during cardiac testing
• Selected high-risk coronary findings
• Narrowing within a previously treated area

A stent treats one section of an artery. It does not remove the underlying tendency to develop plaque elsewhere.

Long-term care may still include:

• Antiplatelet medication
• Cholesterol-lowering treatment
• Blood pressure control
• Diabetes management
• Cardiac rehabilitation
• Suitable physical activity
• Avoiding tobacco
• Continuing cardiology follow-up

Patients should not stop prescribed antiplatelet or blood-thinning medication after a stent without direct instructions from the treating cardiology team.

Heart Valve Disease

Heart valves control the direction of blood as it moves through the heart.

A valve may become:

• Too narrow
• Unable to close properly
• Damaged by infection
• Affected by age-related changes
• Abnormal from birth
• Damaged by another heart condition

Possible symptoms include:

• Shortness of breath
• Chest discomfort
• Reduced exercise ability
• Dizziness
• Fainting
• Leg swelling
• Palpitations
• Unusual tiredness
• Heart failure symptoms

Evaluation may involve an echocardiogram, transesophageal echocardiogram, CT imaging, cardiac catheterization, or stress testing.

Treatment depends on the valve involved, symptom severity, heart function, age, general health, and whether a surgical or catheter-based approach is more suitable.

Aortic Valve Stenosis and TAVR Assessment

Aortic valve stenosis occurs when the valve controlling blood flow from the heart into the aorta becomes narrowed.

Possible symptoms include:

• Shortness of breath
• Chest pain
• Reduced walking ability
• Dizziness
• Fainting
• Tiredness
• Heart failure

Transcatheter aortic valve replacement, commonly called TAVR, is a catheter-based procedure used to replace a narrowed aortic valve.

Dr. Ansari’s structural heart fellowship and previous research work include aortic valve intervention. Whether he currently performs a particular valve procedure and whether it is suitable for an individual patient should be confirmed during consultation.

A TAVR assessment may involve:

• Echocardiography
• CT imaging
• Cardiac catheterization
• Blood testing
• Evaluation of the arteries used for catheter access
• Review by a structural heart team
• Assessment of surgical and procedural risk

The heart team may compare TAVR with conventional valve surgery, continued monitoring, or another treatment.

Congenital and Structural Openings in the Heart

Some adults have an opening between heart chambers that has been present since birth.

Examples include:

• Atrial septal defect
• Patent foramen ovale
• Other less common structural abnormalities

Many people with a patent foramen ovale never need treatment.

Closure may be considered only in selected situations after other possible causes of symptoms or stroke have been assessed.

Evaluation may involve:

• Echocardiography
• Bubble testing
• Transesophageal imaging
• Heart rhythm monitoring
• Neurological assessment
• Blood-clotting evaluation
• Review of earlier stroke or circulation events

Dr. Ansari completed focused fellowship training in structural and congenital heart disease. Patients should confirm whether their particular abnormality falls within his current procedural practice.

Peripheral Artery Disease

Peripheral artery disease develops when plaque narrows arteries supplying the legs, arms, or another part of the body.

Possible leg symptoms include:

• Calf or thigh pain while walking
• Leg heaviness
• Cramping
• Reduced walking distance
• A cold foot
• Weak pulses
• Numbness
• Changes in skin color
• A wound that heals slowly
• Toe or foot pain at rest

Some people have advanced peripheral artery disease without typical walking pain.

Testing may include:

• Pulse examination
• Ankle-brachial index
• Arterial ultrasound
• CT angiography
• MR angiography
• Catheter-based angiography

Treatment may involve medication, cholesterol and diabetes care, a structured walking program, wound treatment, angioplasty, stenting, or surgery.

Dr. Ansari has advanced fellowship training in vascular and endovascular intervention and has participated in research involving peripheral artery disease, critical limb ischemia, vascular stents, and catheter access techniques.

Chronic Limb-Threatening Ischemia

Chronic limb-threatening ischemia is an advanced form of peripheral artery disease in which blood flow to a leg or foot becomes severely reduced.

Possible signs include:

• Foot or toe pain at rest
• A wound that will not heal
• Skin breakdown
• Increasing discoloration
• Tissue damage
• Infection
• A cold or numb foot
• Reduced or absent pulses

This condition needs prompt vascular assessment because delayed treatment can increase the risk of infection, tissue loss, and amputation.

Care may require coordination among:

• Interventional cardiologists
• Vascular surgeons
• Wound-care professionals
• Podiatrists
• Diabetes specialists
• Infectious disease doctors
• Rehabilitation professionals

The purpose of treatment may be to restore circulation, help wounds heal, control infection, preserve mobility, and reduce the risk of limb loss.

Wrist and Groin Catheter Access

Catheter procedures may begin through an artery in the wrist or groin.

The most appropriate access point depends on:

• The planned procedure
• Blood vessel anatomy
• Previous vascular treatment
• Bleeding risk
• The location of the blockage
• Available equipment
• The cardiologist’s assessment

Dr. Ansari has published and presented work involving transradial access for peripheral vascular intervention. This approach uses an artery near the wrist to reach blood vessels elsewhere in the body.

Not every patient or procedure is suitable for wrist access. The medical team may need to use the groin or another route when it offers a safer or more practical approach.

High Blood Pressure and Cholesterol

High blood pressure and high cholesterol can contribute to damage within coronary and peripheral arteries.

Cardiovascular assessment may include:

• Reviewing home blood pressure readings
• Checking medication use
• Measuring cholesterol
• Assessing diabetes
• Reviewing kidney function
• Discussing physical activity
• Identifying tobacco exposure
• Reviewing family history
• Estimating overall cardiovascular risk

Patients checking blood pressure at home can record the date, time, result, pulse, symptoms, and whether medication had already been taken.

Regular monitoring may help identify risk factors before they cause major complications. Patients can read more about the importance of regular medical checkups.

Heart Failure

Heart failure means that the heart is not pumping or filling as effectively as the body requires. It does not mean that the heart has completely stopped.

Possible symptoms include:

• Shortness of breath
• Reduced energy
• Difficulty lying flat
• Waking at night feeling breathless
• Leg or foot swelling
• Rapid weight gain from fluid
• Reduced exercise ability
• Continuing coughing
• Abdominal fullness

Possible causes include coronary artery disease, an earlier heart attack, valve disease, long-term high blood pressure, cardiomyopathy, and abnormal heart rhythms.

An interventional or structural cardiologist may become involved when heart failure is connected with blocked coronary arteries, severe valve disease, or another physical condition that might benefit from a procedure.

Cardiovascular Research

Dr. Ansari has participated in research involving:

• Coronary intervention
• Peripheral artery disease
• Structural heart treatment
• Aortic valve procedures
• Chronic limb-threatening ischemia
• Vascular access
• Cardiogenic shock
• Stent technology
• Cardiovascular treatment outcomes

His research record includes multicenter studies involving peripheral vascular devices and long-term results after endovascular treatment.

Research participation does not determine which treatment is right for one patient. Individual recommendations still depend on symptoms, examination findings, imaging, laboratory results, medical history, and patient preferences.

Who May Benefit From Seeing Dr. Ansari

A consultation may be appropriate for adults who:

• Have activity-related chest pressure
• Become short of breath during normal activity
• Have an abnormal stress test
• Have known coronary artery disease
• Need assessment for cardiac catheterization
• Have previously received a coronary stent
• Need follow-up after a heart attack
• Have been diagnosed with aortic valve stenosis
• Need structural heart assessment
• Have an adult congenital heart opening
• Experience leg pain while walking
• Have a slow-healing foot or leg wound
• Have poor circulation in a limb
• Need another opinion before a cardiovascular procedure
• Have complex coronary or vascular disease

Patients looking for another healthcare professional can use Doctiplus to find doctors by specialty.

What Patients Can Expect During an Appointment

The consultation usually begins with a detailed review of symptoms, medical conditions, medicines, and previous cardiovascular testing.

Dr. Ansari may ask:

• When did the symptoms begin?
• Do symptoms occur during activity or rest?
• How long does chest discomfort last?
• Does discomfort extend into the arm, jaw, shoulder, or back?
• Has shortness of breath developed?
• Has fainting or dizziness occurred?
• Has a heart attack happened before?
• Has a coronary or vascular stent been placed?
• Is heart valve disease present?
• Do the legs hurt while walking?
• Are wounds present on the feet or legs?
• Is there diabetes or kidney disease?
• Which medicines and supplements are being taken?

The examination may include checking:

• Blood pressure
• Heart rate and rhythm
• Oxygen level
• Heart sounds
• Breathing
• Neck blood vessels
• Leg swelling
• Foot pulses
• Skin temperature and color
• Signs of reduced circulation

Possible next steps include medication changes, blood tests, electrocardiography, echocardiography, stress testing, rhythm monitoring, vascular ultrasound, cardiac catheterization, or continued observation.

Preparing for the Appointment

Patients can prepare by bringing:

• A complete medication list
• Medication dosages
• Supplement information
• Allergy details
• Home blood pressure records
• Blood sugar readings
• Cholesterol results
• Previous electrocardiograms
• Echocardiogram reports
• Stress-test findings
• Cardiac catheterization images
• Coronary or vascular stent information
• Valve imaging
• Arterial ultrasound reports
• Wound-care records
• Hospital discharge documents
• Insurance and referral information
• Written questions

Patients with a coronary or vascular stent should bring the implant information card when available.

A short symptom record may also help. It can explain when symptoms happen, how long they last, what activity triggers them, and what makes them improve.

Questions to Ask Dr. Ansari

Patients may consider asking:

• What is the most likely cause of my symptoms?
• Do my test results suggest coronary artery disease?
• Are additional tests needed?
• Why is cardiac catheterization being considered?
• Could medication be tried before a procedure?
• What benefit would angioplasty or a stent provide?
• Do I have a structural heart condition?
• Is my heart valve problem severe enough to treat?
• Should I be assessed for TAVR?
• Does an abnormal opening in my heart need treatment?
• Could my leg symptoms be caused by poor circulation?
• Is a vascular procedure necessary?
• Could contrast material affect my kidneys?
• What are the main risks in my case?
• Which medicines should I take before testing?
• How long might recovery take?
• Will cardiac rehabilitation be recommended?
• Would another opinion be reasonable?
• Which symptoms require emergency care?

Patients should understand the purpose of a proposed test or procedure and how its results may affect the treatment plan.

Practice and Appointment Information

Dr. Ansari is listed with Northwest Houston Heart Center.

Tomball Office

308 Holderrieth Boulevard
Tomball, TX 77375

Houston Methodist appointment number:
832-402-9518

Cypress Office

24518 Northwest Freeway
Medical Office Building 2, Suite 445
Cypress, TX 77429

Practice phone:
281-351-4911

Northwest Houston Heart Center also maintains offices in Magnolia and The Woodlands, but patients should confirm whether Dr. Ansari personally sees patients at those locations.

His individual National Provider Identifier is 1073762084.

Current Appointment Availability

Current public information is not fully consistent.

Houston Methodist lists Dr. Ansari as accepting new patients at the Tomball and Cypress offices and identifies Houston Methodist Cypress Hospital as an affiliated hospital. It currently lists no video visits.

However, Northwest Houston Heart Center’s individual provider page states that Dr. Ansari is currently on personal leave.

Patients should therefore contact the practice before arranging travel, transferring records, or requesting an appointment. The office can confirm:

• Whether Dr. Ansari has returned from leave
• Which office is scheduling his appointments
• Whether new consultations are available
• Whether another cardiologist will provide temporary care
• Whether previously scheduled visits need to be changed

Hospital Affiliation

Houston Methodist currently associates Dr. Ansari with:

• Houston Methodist Cypress Hospital

HCA Houston Healthcare also maintains a physician listing for him, but the publicly accessible profile provides limited detail. Hospital participation may depend on the procedure, current privileges, insurance network, and appointment location.

Patients should confirm the planned hospital before arranging catheterization, structural heart testing, or vascular treatment.

Languages and Communication

Houston Methodist currently lists English as the language associated with Dr. Ansari’s practice.

Patients who need another language should ask whether a qualified interpreter can be arranged. Interpreter assistance can be especially important when discussing procedural consent, medication, risks, and follow-up instructions.

Insurance and Telehealth Information

Insurance coverage can differ among the physician, hospital, catheterization laboratory, imaging provider, and laboratory.

Before scheduling, patients should ask:

• Is Dr. Ansari included in my current network?
• Is a primary care referral required?
• Does cardiac testing need prior authorization?
• Is the planned hospital in network?
• Are the doctor and facility billed separately?
• Is structural heart imaging covered?
• Does a vascular procedure require separate approval?
• Is Dr. Ansari currently accepting appointments?
• Should previous imaging be sent before the visit?
• Is an in-person consultation required?

Houston Methodist currently states that video visits are not available through its directory. Patients should confirm whether the practice offers any other remote follow-up option.

New chest symptoms, fainting, circulation problems, foot wounds, and concerns requiring pulse or heart examination generally need in-person assessment.

When Heart or Circulation Symptoms Require Urgent Care

Patients should not wait for a routine cardiology appointment when symptoms may indicate a heart attack, stroke, serious rhythm problem, or sudden loss of blood flow.

Urgent assessment may be needed for:

• New or severe chest pressure
• Chest discomfort with sweating or nausea
• Pain extending into the arm, jaw, shoulder, or back
• Severe breathing difficulty
• Sudden fainting
• A rapid or irregular heartbeat with severe weakness
• New confusion
• Sudden weakness on one side
• New difficulty speaking
• Sudden loss of vision
• A cold, pale, blue, painful, or numb limb
• A foot wound with rapidly increasing discoloration
• Heavy bleeding from a catheter access site
• Rapid swelling accompanied by breathing problems
• Serious symptoms after a heart or vascular procedure

Patients can review general guidance about when immediate medical attention is the right choice, but potentially life-threatening symptoms require prompt emergency assessment.