What is a normal ECG rhythm?

As a medical professional with expertise in cardiology, I can provide you with an accurate description of a normal ECG rhythm. A normal ECG rhythm, also known as sinus rhythm, is characterized by a regular pattern of electrical impulses that originate from the sinus node, which is the natural pacemaker of the heart. The sinus node is located in the right atrium and is responsible for initiating the heartbeat. In a normal sinus rhythm, the heart rate is typically between 60 to 100 beats per minute (BPM) for adults at rest. The ECG will show a consistent pattern of P waves, followed by QRS complexes, and then T waves, in a repeating cycle. The P wave represents the atrial depolarization, which is the spread of electrical signals through the atria, causing them to contract and push blood into the ventricles. The QRS complex indicates the ventricular depolarization, which is the spread of electrical signals through the ventricles, causing them to contract and pump blood to the lungs and the rest of the body. The T wave represents the repolarization of the ventricles, which is the return to the resting state after contraction. A normal ECG rhythm is essential for the efficient and effective functioning of the heart. Any deviation from this pattern may indicate an abnormality that requires further evaluation by a healthcare professional.

A sinus rhythm is any cardiac rhythm where depolarization of the cardiac muscle begins at the sinus node. It is characterised by the presence of correctly oriented P waves on the electrocardiogram (ECG). Sinus rhythm is necessary, but not sufficient, for normal electrical activity within the heart.