Tachycardia

Tachycardia is a cardiac rhythm characterized by a resting heart rate exceeding 100 beats per minute in adults. It is clinically significant because it can indicate underlying conditions such as hypovolaemia, fever, or arrhythmias that require prompt evaluation and management. A common complication of sustained tachycardia is reduced cardiac output, which may lead to dizziness, hypotension, or heart failure.