What Does a Cardiologist Do? A Simple Guide to Heart Health Experts


When someone says, “I need to see a cardiologist,” you probably know it has something to do with the heart. But what exactly does a cardiologist do? And when should you see one?

Let’s explore the world of heart doctors in a way that’s simple and helpful.

Who Is a Cardiologist?

A cardiologist is a medical doctor who specializes in diagnosing, treating, and preventing heart and blood vessel diseases. They’re the experts you go to when you have problems like chest pain, high blood pressure, irregular heartbeat, or anything related to the cardiovascular system.

They do not perform heart surgery (that’s what a cardiac surgeon does), but they work closely with surgeons when surgery is needed.

What Does a Cardiologist Actually Do?

Here are some of the key things cardiologists handle:

1. Diagnose Heart Problems

  • Chest pain (angina)
  • Shortness of breath
  • Irregular heartbeats (arrhythmias)
  • High blood pressure (hypertension)
  • Heart failure
  • Heart valve diseases
  • Congenital heart conditions

2. Run Specialized Tests

Cardiologists often perform or order tests such as:

  • Electrocardiogram (ECG/EKG) – checks heart rhythm
  • Echocardiogram – ultrasound of the heart
  • Stress test – measures heart performance during exercise
  • Holter monitor – 24-hour heart rhythm tracking
  • Cardiac catheterization – checks for blockages in arteries

3. Create a Treatment Plan

  • Prescribing medication
  • Recommending lifestyle changes (diet, exercise, quitting smoking)
  • Referring patients for surgery if needed
  • Monitoring chronic heart conditions

4. Prevent Heart Disease

Prevention is a big part of a cardiologist’s job. They help manage risk factors like:

  • Diabetes
  • Obesity
  • High cholesterol
  • Family history of heart disease

When Should You See a Cardiologist?

You should consider visiting a cardiologist if:

  • You have chest pain or tightness
  • You experience shortness of breath or dizziness
  • You have high blood pressure that’s hard to control
  • You feel your heart beating too fast, too slow, or irregularly
  • You have a family history of heart disease or stroke
  • You’re a smoker, diabetic, or overweight with other risk factors

What Happens During a Visit?

At your first appointment, the cardiologist will:

  • Review your medical history
  • Listen to your heart and lungs
  • Check your blood pressure and pulse
  • Possibly recommend tests for a clear diagnosis

From there, they’ll guide you with the right treatment or preventive plan to keep your heart healthy and strong.

Final Thoughts

Your heart is one of the most important organs in your body — and a cardiologist is your go-to expert for keeping it healthy. Whether you have symptoms or just want a heart check-up, don’t hesitate to consult a specialist.

Taking care of your heart today can save your life tomorrow.

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