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Sinus Tachycardia EKG Interpretation with Rhythm Strip

EKG Features

Rate: Fast (> 100 bpm)
Rhythm: Regular
P Wave: Normal, may merge with T wave at very fast rates
PR Interval: Normal (0.12-0.20 sec)
QRS: Normal (0.06-0.10 sec)
Occurs when the rate of electrical impulse formation occurs at a rate exceeding 100 bpm.
Sinus tachycardia is a fast rhythm with sinoatrial node impulses greater than 100 beats per minute. Heart rate varies normally with age, with infants and young children having fast rates. Sinus tachycardia is a normal response during exercise and when under stress. Many other factors will cause sinus tachycardia including heart failure, COPD, fever and stimulants.
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Sinus Tachycardia EKG Interpretation Example

ekg rhythm strip for reference guide



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Authors, Reviewers and Developers EKG rhythms classes: Thomas O'Brien.
EKG monitor simulation: Steve Collmann
12 Lead Lecture: Dr. Michael Mazzini, MD, Cardiologist.
Spanish EKG: Breena R. Taira, MD, MPH
Medical review: Dr. Jonathan Keroes, MD, Cardiologist,
Dr. Barbara Erickson, PhD, RN, CCRN.
EKG tracings review: Dr. Pedro Azevedo, MD, Cardiology
Last Update: 11/10/2022

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