Valve abnormalities can exist from birth. Infection may damage valves, and aging can lead to weakening or hardening. When valves don't open freely, the condition is called stenosis. If they don't close completely, it's called regurgitation or valve insufficiency or incompetency. Electrical Signals from your heart's electrical system tell your heart to beat, typically 70-100 times a minute.
Signals begin in the sinus node in the right atrium.
They travel along specialized pathways, setting off the regular contractions of the heart's chambers. If this system is disrupted, abnormal heartbeats called arrhythmias occur. The heart beats too fast, too slowly or irregularly. High blood pressure, angina, heart attacks and heart surgery can damage areas of heart muscle and redirect electrical signals. Other triggers include extreme stress, exertion, heavy drinking, medicines and stimulant drugs including caffeine and cocaine.