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Home  /  Conditions  /  Atrial Fibrillation

Atrial Fibrillation (AFib) Diagnosis & Treatment

Specialist care for atrial fibrillation — rhythm control, rate control, and stroke prevention. Personalized treatment based on your AFib pattern and your individual stroke risk.

Atrial Fibrillation

Understanding Atrial Fibrillation

Atrial fibrillation, often shortened to AFib or AF, is the most common sustained heart rhythm disorder. Instead of beating in a coordinated rhythm, the upper chambers of the heart quiver irregularly, so the pulse becomes fast and irregular.

AFib matters for two separate reasons. It can make you feel unwell — breathless, tired, or aware of a racing heartbeat. More importantly, it allows blood to pool in the upper chambers, which substantially increases the risk of stroke when it is left untreated.

Some people feel every episode. Others have no symptoms at all and learn about AFib during a routine examination or from a wearable device. Either way, the condition needs a confirmed diagnosis, a formal stroke risk assessment, and a long-term treatment plan.

Meet Our Cardiology Team

Experienced. Compassionate. Focused on You.

When you have been diagnosed with atrial fibrillation, knowing who will manage it matters. Our cardiologists assess each patient individually rather than relying on a single test result, and take the time to explain your stroke risk and the reasoning behind your treatment plan.

Portrait of Dr. Rizwan Khan, general cardiologist

Rizwan Khan, MD, FACC

General & Preventive Cardiology

MD — Doctor of Medicine
FACC — Fellow of the American College of Cardiology
Fellowships: Cleveland Clinic and Loyola University Medical Center
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Portrait of Dr. Muhammad Waheed Raja, general cardiologist

Muhammad Waheed Raja, MD

Preventive & Non-Invasive Cardiology

MD — Doctor of Medicine
Cardiology fellowship: Tulane University School of Medicine
Former Clinical Assistant Professor of Medicine, UTMB
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Portrait of Dr. Afaq Motiwala, interventional cardiologist

Afaq Motiwala, MD, FACC, RPVI

Interventional & Vascular Cardiology

FACC — Fellow of the American College of Cardiology
RPVI — Registered Physician in Vascular Interpretation
Interventional fellowship: Temple University Hospital
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Why Us

Why Patients Choose Alliance Heart & Vascular

Personalized Heart Care

Treatment plans tailored to your symptoms, history, and individual needs.

Comprehensive Cardiology

Preventive, diagnostic, interventional, and vascular care in one practice.

Advanced Cardiac Testing

Modern diagnostics for heart rhythm, function, structure, and blood flow.

Convenient Greater Houston Access

Serving Pearland with additional locations expanding across Greater Houston.

Board-Certified Cardiologists

Experienced physicians with advanced cardiovascular training and expertise.

Most Major Insurances Accepted

We work with many leading insurance plans for convenient access to care.

Heart Health Resources

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Locations

Comprehensive Cardiovascular Care Close to Home

Alliance Heart & Vascular is expanding to serve patients across Pearland, Greater Houston and surrounding communities.

Pearland

Comprehensive cardiology, preventive cardiovascular care, diagnostic evaluation, and follow-up.

View Pearland Location

More locations coming soon

Alliance Heart & Vascular is expanding across Greater Houston and nearby communities, bringing convenient access to trusted cardiovascular care closer to where our patients live and work.

Insurance

Insurance We Accept

Alliance Heart & Vascular works with many major health insurance plans. Insurance participation can vary by plan, network, employer, and location.

Please call (346) 614-0002 before your appointment to verify your specific insurance benefits and network participation. Our team can help answer questions about scheduling, referrals, and insurance verification.

Before your visit

Call ahead to verify benefits and network participation
Ask whether your plan requires a referral
Bring your insurance card and photo ID
Bring prior cardiac test results if you have them
When to Seek Care

When Should You See a Cardiologist for Atrial Fibrillation?

AFib is a diagnosis that needs specialist follow-up, not just symptom relief. Even when episodes are brief or you feel completely well, stroke risk has to be assessed formally. A cardiology evaluation confirms the rhythm, identifies the conditions driving it, and sets a long-term plan.

A new diagnosis of atrial fibrillation
An irregular pulse found on examination
AFib flagged by a smartwatch or home device
A fast, irregular heartbeat
Episodes that start and stop on their own
An irregular rhythm that has become constant
Breathlessness with everyday activity
Reduced exercise tolerance
Unexplained fatigue
Lightheadedness or near-fainting
Chest discomfort with an irregular rhythm
AFib alongside high blood pressure
AFib with sleep apnea or thyroid disease
A stroke or TIA with a known irregular rhythm
Difficulty tolerating your current AFib medication
AFib diagnosed during an emergency department visit

Even when AFib episodes stop on their own, the stroke risk they carry does not stop with them. Formal risk assessment is part of every AFib evaluation, regardless of how you feel.

Related Heart Conditions

Atrial fibrillation can occur alongside, or contribute to, several cardiovascular conditions. Learn more about:

Emergency Reminder

If an irregular heartbeat occurs with chest pain, fainting, or severe breathlessness — or with sudden facial drooping, arm weakness, or difficulty speaking — call 911 immediately.

Do not wait for an office appointment.

Online appointment requests should never be used for potentially life-threatening symptoms.

Symptoms

What Does Atrial Fibrillation Feel Like?

AFib affects people very differently. Some feel every episode intensely, while a substantial number of patients have no symptoms at all. Common experiences include:

How the rhythm feels

An irregular pulse
A racing heartbeat
Fluttering in the chest
Pounding or thumping beats
A heartbeat that feels chaotic
Episodes that begin abruptly
A rhythm that will not settle
An unusually fast pulse at rest
No sensation at all

Symptoms that may occur with it

Breathlessness
Fatigue or low energy
Reduced exercise tolerance
Lightheadedness
Chest discomfort
Difficulty sleeping flat

Because AFib can be completely silent, symptoms are not a reliable guide to how much risk it carries. Stroke risk is calculated from your age and medical history, not from how the rhythm feels.

Causes

What Causes Atrial Fibrillation?

AFib usually develops when another condition places strain on the upper chambers of the heart. Identifying and treating those drivers is part of controlling the rhythm rather than a separate exercise.

Call 911 immediately if a heart attack is suspected. Do not drive yourself to hospital.

High Blood Pressure

The most common contributor. Long-standing hypertension stretches and stiffens the upper chambers, creating the conditions in which AFib develops and returns.

Heart Valve Disease

A leaking or narrowed valve raises pressure inside the atria and is a well-recognized driver of atrial fibrillation.

Sleep Apnea

Untreated obstructive sleep apnea is strongly associated with AFib and with recurrence after treatment. Screening is often part of the evaluation.

Thyroid Disease

An overactive thyroid can precipitate atrial fibrillation, which is why thyroid function is checked in every new diagnosis.

Coronary Artery Disease and Heart Failure

Reduced blood supply or a weakened heart muscle alters the electrical properties of the atria and makes AFib considerably more likely.

Alcohol, Weight, and Fitness

Excess alcohol, weight gain, and low fitness are modifiable drivers. Addressing them measurably reduces how often AFib returns after treatment.

Triggers

What Can Trigger an Episode of AFib?

Many patients notice that episodes cluster around particular triggers. Recognizing your own pattern is a practical part of managing the condition. Common triggers include:

Alcohol, particularly binge drinking
Caffeine or energy drinks
Dehydration
Poor or interrupted sleep
Acute illness or infection
Emotional or physical stress
Electrolyte imbalance

Do not assume

Patients should not assume that an episode which settles on its own has been dealt with. AFib that comes and goes can carry a similar stroke risk to AFib that is constant, and still requires formal assessment.

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10905 Memorial Hermann Drive, Suite 203, Pearland, TX 77584
Downtown Houston — serving the Texas Medical Center, Midtown, and Downtown
Monday–Friday, 8:00 a.m. – 4:30 p.m.
(346) 614-0002
Types

Types of Atrial Fibrillation

AFib is classified by how long episodes last. The pattern influences which rhythm treatments are realistic, though it does not by itself determine your stroke risk.

Paroxysmal AFib

Episodes begin and stop on their own, usually within seven days. Symptoms can be intense, but the rhythm returns to normal in between.

Persistent AFib

Episodes last longer than seven days and do not resolve without treatment. Cardioversion or medication may be used to restore a normal rhythm.

Long-Standing Persistent AFib

AFib has been continuous for more than a year. Restoring normal rhythm remains possible in selected patients but becomes more difficult the longer it persists.

Permanent AFib

A shared decision has been made to stop attempting to restore normal rhythm. Treatment then focuses on rate control and stroke prevention.

Silent AFib

AFib discovered incidentally in a patient with no symptoms. It carries the same stroke risk and requires the same assessment as symptomatic AFib.

Diagnostics

Cardiac Testing for Atrial Fibrillation

Not every patient needs every cardiac test. Testing should be selected based on your symptoms, examination, medical history, and cardiovascular risk. Depending on your individual situation, your cardiologist may recommend one or more of the following.

Advanced Cardiovascular Imaging

Certain patients may require additional cardiac imaging or coronary evaluation depending on their symptoms and risk profile. Your cardiologist will explain why a particular test is being recommended and how the results may influence your treatment plan.

Treatment

Treatment for Atrial Fibrillation

AFib treatment has three separate goals: preventing stroke, controlling the heart rate, and where appropriate restoring normal rhythm. Stroke prevention is assessed for every patient independently of how the rhythm itself is managed. Treatment may include:

Formal stroke risk assessment
Anticoagulation to reduce stroke risk
Bleeding risk assessment and review
Rate-control medication
Rhythm-control medication
Electrical cardioversion
Catheter ablation referral
Blood pressure control
Sleep apnea screening and treatment
Thyroid and electrolyte correction
Alcohol reduction and weight management
Extended heart rhythm monitoring
Ongoing anticoagulation and rhythm review

Our objective is not simply to slow the heart rate. We want to protect you from stroke, restore normal rhythm where that is achievable, and treat the conditions that keep bringing AFib back.

Interventional cardiology
After the ER

Diagnosed With AFib in the Emergency Room?

Many patients first learn they have atrial fibrillation during an emergency visit. The emergency team's priority is to settle the heart rate and exclude immediate danger. Decisions about long-term stroke prevention, rhythm strategy, and the conditions driving your AFib belong in an outpatient cardiology review.

You should arrange cardiology follow-up if you have:

A new atrial fibrillation diagnosis
Been started on an anticoagulant
Been started on rate-control medication
Undergone a cardioversion
Continuing breathlessness or fatigue
Recurrent episodes since discharge
Questions about long-term rhythm treatment
Bring your discharge documents, ECG tracings, and a current medication list to your cardiology appointment. Do not stop an anticoagulant without first speaking to your cardiologist.
FAQ

Frequently Asked Questions About Atrial Fibrillation

Still have questions?

Talk to our office — Monday to Friday, 8:00 a.m. to 4:30 p.m.

Call (346) 614-0002

Atrial fibrillation is an irregular heart rhythm that begins in the upper chambers of the heart. Instead of contracting in a coordinated way, the atria quiver, which produces a fast and irregular pulse.

Call 911 for chest pain, fainting, severe breathlessness, or any sign of stroke — sudden facial drooping, arm weakness, or difficulty speaking. Do not drive yourself to the hospital.

When the atria quiver rather than contract properly, blood can pool and form a clot. If that clot travels to the brain it causes a stroke. This is why stroke prevention is assessed in every patient with AFib.

Possibly. Stroke risk in AFib is determined largely by your age and medical history rather than by how often episodes occur. Paroxysmal AFib can carry a similar risk to continuous AFib, so the decision is based on formal risk scoring rather than symptom frequency.

AFib can often be controlled very effectively, and catheter ablation eliminates episodes in selected patients. However, AFib has a tendency to recur, so long-term follow-up and treatment of the underlying risk factors remain important.

Rate control accepts the irregular rhythm and slows the heart to a comfortable speed. Rhythm control aims to restore and maintain a normal rhythm using medication, cardioversion, or ablation. Either may be appropriate depending on your symptoms, age, and other conditions.

An ECG confirms the rhythm while AFib is present. If episodes come and go, ambulatory heart monitoring is used to capture them. An echocardiogram assesses heart structure and valves, and blood tests check thyroid function and electrolytes.

Wearable devices are increasingly good at flagging an irregular rhythm, but a notification is not a diagnosis. Bring the recording to your appointment so it can be confirmed with a medical-grade ECG or monitor.

Most patients can and should stay active, and improved fitness reduces AFib recurrence. Your cardiologist will advise on appropriate intensity based on your rate control and any other cardiac conditions.

Yes. Alcohol is one of the most consistently identified triggers, and reducing intake measurably lowers how often episodes occur. Binge drinking is a particularly common trigger.

Strongly. Untreated obstructive sleep apnea makes AFib more likely to occur and more likely to return after cardioversion or ablation, which is why screening is often recommended.

Cardioversion is a procedure that restores a normal rhythm, using either a controlled electrical shock under sedation or medication. Anticoagulation is usually required beforehand to reduce the risk of stroke during the procedure.

Yes. A substantial proportion of patients feel nothing at all, which is why AFib is sometimes discovered during a routine examination. Silent AFib carries the same stroke risk as AFib you can feel.

Bring your medication list, insurance information, identification, previous heart-test results, any smartwatch or home ECG recordings, and hospital or emergency room records.

Yes. Alliance Heart & Vascular welcomes new patients seeking cardiovascular evaluation. Call our office or request an appointment online.

Concerned About Atrial Fibrillation?

An irregular heartbeat should be diagnosed, not guessed at.

Whether you have been newly diagnosed with AFib, received an alert from a wearable device, been started on an anticoagulant in the emergency room, or are having recurrent episodes despite treatment, our cardiologists can confirm the rhythm, assess your stroke risk, and build a long-term plan.

Request an Appointment

New patients are welcome.

Serving patients throughout Pearland, Greater Houston, and surrounding areas.