What causes the heart rhythm to go below line?

The heart rhythm can drop below the line for a number of reasons, which may be caused by a disorder of the heart's electrical system. If the heart is beating too slowly or is blocked in some way, the oxygen-rich blood can't be pumped out of the heart as effectively. This can cause a number of symptoms, such as dizziness, light-headedness, fainting, and shortness of breath. In some cases, a heart rhythm below normal can be a sign of a serious heart condition, such as a heart attack.

Below are few common causes that may cause the heart rhythm to go below the line:

* Sick Sinus Syndrome (SSS)

Sick sinus syndrome (SSS) is a condition that occurs when the sinus node, which is the natural pacemaker of the heart, does not work properly. This can cause the heart rate to become too slow (bradycardia), too fast (tachycardia), or irregular.

* Atrioventricular Block (AV Block)

Atrioventricular block (AV block) is a condition that occurs when the electrical signals from the atria (the upper chambers of the heart) are not properly conducted to the ventricles (the lower chambers of the heart). This can cause the ventricles to beat too slowly, leading to a drop in heart rate.

* Myocardial Infarction (Heart Attack)

A myocardial infarction, or heart attack, occurs when the blood supply to the heart is blocked, usually by a blood clot. This can damage the heart muscle, including the sinus node and the atrioventricular node, leading to a drop in heart rate.

It is important to note that a heart rhythm below normal can be caused by a number of factors, and it is important to consult a doctor if you experience any symptoms or concerns.