Sinus Tachycardia - EKG Reference

Sinus Tachycardia EKG tracing

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Caliper Time Interval: ___ seconds




Key Features

RhythmRegular
RateFast (> 100 bpm)
P WaveNormal, may merge with T wave at very fast rates
PR IntervalNormal (0.12-0.20 sec)
QRSNormal (0.06-0.10 sec)
NotesQT interval shortens with increasing heart rate

Sinus Tachycardia EKG Reference

Definition of Sinus Tachycardia

Sinus Tachycardia is characterized by a pulse rate of more than 100 beats per minute in adults. The electrical signals originate in the sinoatrial (SA) node. Appropriate sinus tachycardia can result from exercise, alcohol or caffeine, drugs and anxiety.

Inappropriate Sinus Tachycardia

Inappropriate Sinus Tachycardia is fairly rare. It can result from hypotension, hypoxia, congestive heart failure, bleeding, cardiomyopathy, myocarditis, anemia and fever.






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