"The patients who do best are the ones who came in before a small problem became a serious one."

I've been practicing cardiology in Houston since 1979, and if there's one thing four decades at the bedside has taught me, it's this: most people who suffer a serious cardiac event had warning signs months — sometimes years — earlier. They waited. They hoped it would go away. They didn't want to be "that person" who makes a fuss over nothing.

This post is for anyone who has felt that nagging voice in the back of their mind saying, "Maybe I should get this checked out." That voice is worth listening to. Here's what to look for — and what it might mean.

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Warning Signs

7 signs that mean it's time to see a cardiologist

These aren't meant to alarm you — they're meant to inform you. Recognizing these symptoms early is one of the most powerful things you can do for your long-term cardiovascular health.

1

Chest pain or pressure

Tightness, squeezing, or heaviness in the chest — especially during activity — is a classic warning sign that should never be dismissed or waited out.

2

Unexplained shortness of breath

If climbing a flight of stairs leaves you winded in a way it didn't a year ago, your heart may not be pumping with the efficiency it should.

3

Irregular heartbeat

Palpitations, flutters, or a racing sensation — especially paired with dizziness — can signal an arrhythmia that deserves a proper evaluation.

4

High blood pressure

Hypertension is called the "silent killer" for good reason. Most people feel nothing — until significant damage has already been done to arteries and the heart muscle.

5

Swelling in legs or ankles

Fluid buildup can indicate that the heart isn't circulating blood as effectively as it should — a sign that warrants a cardiovascular workup.

6

Unusual fatigue

Feeling persistently exhausted despite enough sleep — particularly in women — is an often-overlooked but real early indicator of heart disease.

7

Dizziness or fainting

Sudden lightheadedness or loss of consciousness can point to a blood flow problem, low blood pressure, or an issue with the heart's electrical system.

Emergency warning: If you experience sudden, severe chest pain — especially with pain radiating to your arm, jaw, neck, or back — call 911 immediately. Do not drive yourself. Do not wait and see. This is a medical emergency.

#1
Heart disease is the nation's leading cause of death
80%
Of heart disease cases are preventable with early action
47%
Of cardiac events occur outside of a hospital setting
1 in 3
Adults have some form of cardiovascular disease
What Most People Don't Know

You don't have to have a "heart attack" to have heart disease

Here's something I tell patients in my office all the time: heart disease doesn't always announce itself dramatically. For many people, it builds quietly over years — narrowed arteries, thickened heart walls, or valves that gradually stop working quite right. By the time a heart attack strikes, it's often the result of years of unaddressed cardiovascular disease.

The encouraging news? Modern cardiology has extraordinary diagnostic tools that can catch these problems early — often before any serious damage has occurred. A simple electrocardiogram (ECG/EKG), echocardiogram (heart ultrasound), or nuclear cardiology scan can reveal a great deal about what's happening inside your heart.

Early detection of high blood pressure, coronary artery disease, and arrhythmias can dramatically reduce your risk of a cardiac event — and in many cases, lifestyle changes alone make a measurable difference. You have more power over your heart health than you may realize.

"I believe in treating each patient the way I would want to be treated. Having been a patient myself, I find that quite easy to do. I share all results and information with you regarding your personal health situation — and I realize that confidentiality is paramount."
NZ
Dr. Nadim M. Zacca, MD
Associate Professor of Clinical Medicine · Baylor College of Medicine · Houston, TX
Comprehensive Care

What we check for at our Houston cardiology practice

At our practice in Cleveland, TX — serving the greater Houston area — we handle every aspect of cardiovascular care from diagnosis through treatment. You'll never need to navigate multiple offices just to get answers about your heart.

High blood pressure management
Electrocardiography (ECG / EKG)
Echocardiography (heart ultrasound)
Nuclear cardiology imaging
Heart catheterization
Coronary angioplasty (PTCA) & stenting
Endovenous laser ablation (EVLT)
Artery & vein disease treatment
Irregular heartbeat management
Preventive cardiology counseling

We are participating providers in Medicare and Medicaid, and are contracted with nearly all major HMOs, PPOs, POS, and fee-for-service insurance plans throughout the Houston area.

Prevention First

The best heart procedure is the one you never need

Over my career, I've seen patients completely transform their cardiovascular health through changes that seem modest at first — quitting smoking, walking 30 minutes a day, managing stress, simply knowing their blood pressure and cholesterol numbers. These things compound over time in the most powerful way imaginable.

When lifestyle changes aren't enough on their own, we have exceptional medical tools to help. The key is showing up before your body forces you to. Prevention is not about fear — it's about understanding your body well enough to stay ahead of the problems that are entirely within your power to avoid or delay.

Frequently Asked Questions

Answers to common cardiology questions

For informational purposes only. Always consult a physician for personal medical advice.

Your primary care doctor is often the first stop — and they may refer you to a cardiologist if they detect an abnormal EKG, persistent high blood pressure, or concerning symptoms. However, if you have a strong family history of heart disease, you're experiencing any of the symptoms listed above, or you've already had a cardiac event, seeing a cardiologist directly makes a great deal of sense. You don't always need a referral to make an appointment at our office.
Your first visit typically involves a detailed medical history, a thorough physical exam, and baseline diagnostic tests — usually an EKG and possibly blood work or an echocardiogram depending on your symptoms. The goal is to build a complete, individualized picture of your heart health so we can create a personalized plan, whether that means lifestyle guidance, medication management, or more detailed testing.
In many cases, yes — or at least significantly delayable. Risk factors like high blood pressure, high cholesterol, smoking, physical inactivity, and unmanaged diabetes all contribute to heart disease, and most of them can be meaningfully addressed. Even patients with a strong genetic predisposition can dramatically reduce their risk with the right combination of lifestyle changes and appropriate medical management.
Angioplasty (PTCA) is a minimally invasive procedure used to open blocked or narrowed coronary arteries. A small balloon is inserted and inflated at the blockage site, and in most cases a stent is placed to keep the artery open long-term. It's typically recommended when a coronary artery is significantly blocked and causing symptoms like chest pain, or following a heart attack. Dr. Zacca holds multiple U.S. and international patents on angioplasty techniques developed during his tenure at Baylor.
Yes. Our practice participates in Medicare and Medicaid, and we are contracted providers for nearly all major HMOs, PPOs, POS plans, and fee-for-service insurance programs throughout the Houston area. Our staff is happy to verify your specific coverage before your visit so there are no surprises.
Cardiac chest pain is often described as a pressure, squeezing, or heaviness — sometimes spreading to the left arm, jaw, neck, or back. It may come on with physical exertion and ease with rest. However, chest pain has many possible causes, and only a proper medical evaluation can distinguish a heart-related origin from other conditions. If the pain is sudden or severe, call 911 immediately. If the pain is new, recurring, or unexplained, schedule an evaluation as soon as possible rather than waiting to see if it resolves on its own.
Ready to Take the Next Step?

Your heart deserves a second opinion — or a first one

Whether you're experiencing symptoms or simply want to understand your cardiovascular health better, our Houston-area office is here to help with care delivered with dignity, respect, and genuine compassion.

Schedule an Appointment Learn More About Us

Smith Tower 6550 Fannin St., Suite 2427 Houston, Texas 77030  ·  (713) 795-4059