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Cardiology is the branch of medicine that focuses on the heart and blood vessels. Cardiologists diagnose and treat heart-related problems, such as heart disease, abnormal heart rhythms, and problems with blood flow. They also help reduce the risk of heart disease by assessing risk factors and advising on heart-healthy lifestyle changes.

Cardiology covers heart conditions at different stages of life, including some conditions present from birth and those that develop with age. Doctors may use tests such as ECGs, echocardiograms, and other heart tests to diagnose and monitor these conditions.

A cardiologist is a specialist doctor who is trained to diagnose and treat diseases of the heart and blood vessels. In India, this typically involves completing an MBBS, followed by postgraduate training in general medicine or another eligible specialty, and then advanced training in cardiology through DM or DrNB.

Cardiologists are trained to manage various heart conditions, including heart emergencies, abnormal heart rhythms, heart failure, and problems with blood flow. They may also perform specialised tests and procedures to diagnose and treat heart conditions.

A cardiologist is a specialist in the heart and cardiovascular system. Their responsibilities include:

• Advanced Diagnostics: Interpreting tests such as echocardiography, exercise or other stress tests, cardiac CT, and cardiac MRI to assess heart structure, function, blood flow, and other cardiovascular problems. 
• Chronic Disease Management: Implementing long-term treatment strategies to control lipid profiles (cholesterol) and resistant hypertension.
• Electrical Intervention: Managing the heart's "wiring" to diagnose and treat abnormal heart rhythms, using medication, cardioversion, catheter ablation, or device-based therapies when appropriate. 
• Preventive Strategy: Identifying metabolic risks (such as diabetes, obesity, and high blood pressure) and developing individualised prevention plans to reduce cardiovascular risk. 
• Interventional Procedures: Using minimally invasive techniques to perform coronary angiographies and procedures such as angioplasty and stent placement when indicated. 
• Pre-Operative and Post-Operative Care: Assessing and managing patients before and after cardiac surgery or other cardiovascular procedures, in collaboration with the surgical team.

You should not wait for a crisis to see a specialist. Consult a cardiologist if you experience:

• Persistent Chest Pain: Feeling a heavy pressure, squeezing, or burning sensation in the centre of the chest.
• Unexplained Palpitations: A racing, fluttering, or pounding heart that feels like it is skipping a beat.
• Difficulty Breathing: Shortness of breath during routine activities or while lying flat at night.
• High Blood Pressure: Repeatedly elevated blood pressure readings or diagnosed hypertension.
• Unusual Swelling: Visible "pitting" oedema in the feet or ankles, which may be associated with fluid retention and several possible conditions, including heart problems. 
• Fainting or Dizziness: Sudden light-headedness or loss of consciousness, which may indicate heart rhythm or other cardiovascular problems. 

Note: Do not ignore persistent or recurring heart-related symptoms. Online consultation can provide initial medical guidance for suitable concerns, but symptoms such as chest pain, severe breathlessness, fainting, or other emergency warning signs require prompt in-person or emergency medical care.

• Shortness of Breath (Dyspnea): A common symptom that can have many causes, including heart and lung conditions. 
• Hypertension: Chronic high blood pressure that increases the workload on the heart and can contribute to heart, kidney, brain, and blood-vessel complications over time. 
• Irregular Heartbeats (Arrhythmias): Disruptions in the heart’s electrical system, causing it to beat too fast, too slow, or erratically.
• High Cholesterol (Dyslipidemia): An excess of fats in the blood that leads to the build-up of plaque in the arteries, severely increasing heart attack risks.
• Oedema: Fluid build-up, typically in the legs or ankles, caused by the heart's inability to circulate blood effectively through the venous system.
• Dizziness and Syncope: Light-headedness or fainting caused by a lack of oxygenated blood reaching the brain, often due to valve or rhythm issues.
• Heart Failure: A progressive condition in which the heart muscle becomes too weak or stiff to pump blood efficiently to the rest of the body.
• Valvular Heart Disease: Damage or defects in one of the four heart valves that regulate blood flow, causing leakage (regurgitation) or narrowing (stenosis).
• Stroke: A cardiovascular event in which blood supply to the brain is interrupted, often linked to heart conditions such as atrial fibrillation.
• Heart Muscle Disease (Cardiomyopathy): Structural changes in the heart muscle that impair its ability to contract and pump blood.
• Pericarditis: Inflammation of the pericardium (the sac-like membrane surrounding the heart), causing sharp, stabbing chest pain.

• Heart Health Fundamentals: Eat more vegetables, fruits, whole grains, fibre, and healthy sources of unsaturated fats. Limit highly processed foods and trans fats. 
• Recognising Chest Pain: Treat any "heavy" or "crushing" chest pain as a medical emergency. If it radiates to your jaw, neck, or left arm, do not drive yourself; call for an ambulance immediately.
• Monitoring Palpitations: Keep a record of episodes of fluttering or a racing heartbeat... Note if they are triggered by caffeine, stress, or exercise to help your cardiologist identify potential arrhythmias.
• Irregular Heartbeat Alert: If your heart starts racing while you are resting, especially if it continues or is associated with chest pain, shortness of breath, dizziness, or fainting, seek medical evaluation. Your doctor may recommend an ECG or other heart-rhythm monitoring. 
• Shortness of Breath Care: If you become short of breath during simple activities such as talking or walking short distances, avoid physical exertion and seek a cardiac evaluation for potential heart failure.
• Heart Attack Symptoms Awareness: Heart attack symptoms can sometimes be less obvious, especially in women and some people with diabetes. Nausea, unusual tiredness, shortness of breath, or jaw pain can occur during a heart attack and should not be ignored. 
• Coronary Artery Disease Prevention: If you have a family history of coronary artery disease (CAD), undergo regular screening tests to detect arterial blockages before they become critical.