World Heart Day is a global health awareness campaign held annually on September 29th to highlight the importance of cardiovascular health. The World Heart Day theme for 2025 is "Don't Miss a Beat", emphasising the importance of not ignoring heart health. This powerful message highlights the importance of continuous vigilance in heart health. It encourages individuals to be proactive, not ignore warning signs, schedule regular check-ups, maintain healthy habits, and seek timely medical attention to prevent premature deaths from cardiovascular disease. Our ‘sweetheart’ of the body can be compared to a beautiful home, that has four rooms, called the atria (two) and the ventricles (two). Just like our home equipped with water and power supply, our heart also has blood supply through the coronary arteries (right and left) and by an electrical wiring system known as the ‘conduction system’ of the heart. The blockage of blood pipes (the coronary arteries) results in what is popularly known as ‘heart attack’. Similarly, any damage to the wiring system of the heart (the conduction system) can cause very slow pulse rate (bradycardia / heart blocks) or sometimes the formation of short-circuits resulting in abnormal fast heart beating (palpitations) known as ‘tachy-arrhythmias. When such abnormal short circuits form inside the heart, they can be potentially dangerous at times, as they result in giddiness and falls, especially in heart disease patients. Why are these short circuits formed inside our heart? Actually, they can be there since birth or can be acquired during aging process or after heart attack. In medical terms we call these abnormal fast heart beatings as supra-ventricular / ventricular tachycardias. Most of the times, they can simply be detected by taking a regular electrocardiogram, popularly known as ECG. Majority of them just come and go, but sometimes they persist for longer times which can result in complications like falls due to syncope (giddiness), paralysis (due to atrial fibrillation) or heart failure (tachy-cardiomyopathy). What do you do if you have an electrical problem in your house? You call a good electrician to check and repair it, right? Same way, there will be a special cardiologist for your heart to check these abnormal electrical connections and circuits (known as Cardiac Electrophysiologist). After evaluation of the patient and the ECGs, these heart specialists will decide whether this can be brought down under control / cure by simply prescribing medicines (called anti-arrhythmic drugs). If they do not respond to drugs, we try to cure it by a procedure known as ‘electrophysiological study and radio-frequency ablation’ (EPS and RFA). Just like an electrician checking the current wires at home to know where the short circuit is, we as electrophysiologists take some small ‘robotic’ catheter wires inside your heart (under local anesthesia via the thigh route, just like doing regular angiograms) to exactly locate how the current of your heart is flowing and the exact location of the short-circuit wires causing this fast heart beating. Sometimes locating them is so difficult that we need special ‘search cameras’ inside the heart, in medical terminology we call them as 3D anatomic mapping system. They help us to see the unseen electrical currents of the heart, both of the normal wires and of the abnormal short-circuits. Also, we can navigate these robotic catheters even without fluoroscopy, avoiding excess radiation. After appropriate localization of the short circuit, we deliver the radio-frequency energy (in principle, nothing but heat) exactly at the same point, destroying the short circuit and restoring the normal currents. These advanced technologies are not only for precision and accuracy of the procedure, but also to avoid potential damage to the normal areas of the heart. The whole sequence you can imagine like hunting a terrorist by a military team to save the hostages. The army has to find the exact location of the criminal, meticulously chase him and finally destroy him without harming the civilians. This is the same thing exactly what we do in treating these arrhythmic disorders inside our cardiac EP lab.