Vignette: A 60 yo with h/o HTN, HLD, hyperthyroidism is admitted for sepsis.
Cardiac telemetry showed event of tachycardia (~130 bpm).
Image 1
This will look like sinus tachycardia (ST). However, carrefull examination of initiation and termination would argue against ST. In ST thre is a gradual warm-up and cool-down in rate. In here there is "abrupt" or sudden increase and decrease in rate. Thus, this is paroxysmal atrial tachycardia (PAT)
Image 2
It is even better viewed by a heart rate histogram or trend.
Image 3
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