An increase in the heart rate is termed as:_________?
Correct answer: B. Tachycardia
- A. Bradycardia
- B. Tachycardia
- C. Trachybradycardia
- D. Non of these
Explanation
Tachycardia is an abnormally rapid heart rate, often described in adults as more than 100 beats per minute at rest. Students may choose bradycardia because both terms describe heart-rate changes, but bradycardia refers to a slow rate.
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About Cardiac Cycle and Heartbeat
The cardiac cycle describes atrial systole, ventricular systole and diastole, including pressure changes, blood movement and the opening or closing of heart valves. It also covers the conduction pathway from the sinoatrial node through the atrioventricular node, bundle of His and Purkinje fibres, and relates these events to heartbeat sounds.
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