In adults, a typical resting heart rate is 60 to 100 beats per minute, but structural or electrical disorders of the heart can cause it to rise or fall. Medications, a lack of sleep, and stress may ...

Blood flows through the heart and generates noises known as heart sounds. These noises occur due to heart valves opening and closing as the heart pumps blood. A doctor can gain valuable information by ...

An abnormal heart rhythm, also known as an arrhythmia, occurs when the heart beats too fast, too slow, or irregularly, which can be caused by various factors affecting the heart’s complex system.