Cardiology

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Cardiology is the medical specialty that studies the heart and the blood vessels. Doctors who specialize in it, called cardiologists, diagnose and treat diseases of the heart, such as blocked arteries, heart failure, abnormal heart rhythms, valve problems, and congenital (birth) heart defects. The heart has an electrical system that helps it beat in a regular rhythm and a mechanical system that pumps blood. Problems can affect one or both parts.

Who works in this field
- Cardiologists: doctors who manage heart diseases.
- Pediatric cardiologists: cardiologists who treat children.
- Cardiothoracic surgeons: surgeons who perform heart surgery (some problems are treated with operations, not by cardiologists alone).
- Subspecialists (different areas of focus) include those who do procedures through blood vessels, study heart rhythms, manage heart failure, interpret heart scans, or focus on imaging the heart.

Main subspecialties
- Interventional cardiology: catheter-based procedures like angioplasty and stent placement to open blocked arteries.
- Clinical cardiac electrophysiology: diagnosing and treating abnormal heart rhythms; may use ablation or implant devices.
- Heart failure and transplant cardiology: caring for people with severe heart failure and those who have or need a heart transplant.
- Nuclear cardiology: imaging tests that use special tracers to evaluate heart blood flow and function.
- Cardiac imaging: advanced heart imaging (echo, MRI, CT) to see heart structure and function.
- Adult congenital heart disease: managing heart defects present from birth in adults.
- Pediatric cardiology: heart disease care for children.

Common tests
- ECG or EKG: records the heart’s electrical activity.
- Echocardiogram: ultrasound pictures of the heart.
- Stress tests: monitor the heart during exercise.
- Blood tests and imaging studies to check heart structure and function.

Common heart diseases
- Coronary artery disease (ischemic heart disease): arteries that feed the heart become narrow or blocked.
- Heart attack (myocardial infarction) and angina: sudden or ongoing chest pain due to reduced blood flow.
- Heart failure: the heart doesn’t pump efficiently.
- Arrhythmias: fast, slow, or irregular heartbeats.
- Cardiomyopathy: disease of the heart muscle.
- Hypertension (high blood pressure): long-term pressure on the heart and vessels.
- Valvular heart disease: problems with the heart valves.
- Congenital heart disease: birth defects in the heart’s structure.

Treatments and procedures
- Lifestyle changes: healthy diet, exercise, not smoking, healthy weight.
- Medications: to control blood pressure, cholesterol, heartbeat, blood thinners, and symptoms.
- Procedures:
- PCI (angioplasty) with stent placement to open blocked arteries.
- CABG (heart bypass surgery) for some complex blockages.
- Transcatheter valve procedures (like TAVR) for valve problems.
- Ablation to fix certain rhythm disorders.
- Pacemakers and defibrillators to regulate or protect the heartbeat.
- Heart rehabilitation: programs to help people recover after a heart event and improve overall heart health.

Why it matters
Heart disease is a leading cause of illness and death worldwide. Cardiology aims to prevent problems, diagnose them early, and treat them effectively to improve quality of life and survival.

A quick note on prevention
Healthy habits—regular exercise, a balanced diet, maintaining a healthy weight, not smoking, and controlling blood pressure and cholesterol—play a big role in reducing the risk of heart disease.

This field is continually advancing with new tests and therapies to keep the heart healthy and to treat heart disease more safely and effectively.