Sinus tachycardia
An ECG at Age 29
ECG from a 29-year-old woman. Symptoms and the reason for recording are not supplied.
Look for
- Sinus P-wave activity before the QRS complexes.
- Adult heart rate above 100/min.
Where to look. Look for P waves in II and aVF, then compare aVR. Count QRS complexes over a known duration.
The sinus node speeds up while maintaining the P–QRS sequence. The ECG identifies the rhythm; it cannot by itself prove infection or another cause.
The source rate is 125/min; no infection is documented.
References & provenance
The ECG Made Easy, 9e, ch. 4, PDF 91–93; Lilly, 6e, ch. 12, p. 293.
ECG Sinus Tachycardia 125 bpm.jpg
ECG Sinus Tachycardia 125 bpm.jpg — Ewingdo — Wikimedia Commons — CC BY-SA 4.0 — https://commons.wikimedia.org/wiki/File:ECG_Sinus_Tachycardia_125_bpm.jpg. Indiquer toute modification. CC BY-SA 4.0
Adaptation: cropping and removal of headers/annotations outside the tracing where applicable; metadata removed. Waveforms have not been redrawn.
Compared with the published source; no independent clinical validation is claimed.
Original annotations & limitations
Tachycardie sinusale
ECG of a 29-year-old female with sinus tachycardia. Heart rate 125 bpm QT/QTc 316/456 ms
Aucune fièvre, infection ou hyperthyroïdie documentée; contexte éducatif futur à signaler comme construit.