ECG Quest > Basics > Rate > Extreme tachycardia

Extreme tachycardia

Extreme tachycardia is a rate that is very, very fast. There is no precise defintion for this. Very fast rates can be dangerous to the heart. Causes of extreme tachycardia include ventricular tachycardia, accessory conduction pathways and re-entrant tachycardia. Infants can have very fast heart rates too.

See also: Rate

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In the ECGquest archives, this ECG has been tagged with: - Palpitations Extreme tachycardia Normal Axis Regular Tachycardia Absent P waves Narrow QRS ST elevation in aVR Widespread ST depression SVT 12-Lead ECG of the Week CC-BY-NC-SA
ECG of the Week – 7th January 2019 – Interpretation

This ECG is from a woman in her 20s who presented with palpitations for an hour.

This ECG shows a regular narrow complex tachycardia (SVT) with secondary ST segment changes due to the extreme rate (205 bpm).

In the ECGquest archives, this ECG has been tagged with: - Chest pain Dyspnoea Extreme tachycardia Normal Axis Regular Tachycardia Absent P waves Anterior ST depression Inferior ST elevation Narrow QRS Reciprocal ST depression Atrial flutter Multi-vessel disease 12-Lead Dr Pendell Meyers Dr Smith's ECG Blog Dr Ken Grauer CC BY-NC
Arrhythmia? Ischemia? Both? Electricity, drugs, lytics, cath lab? You decide.

This ECG is from a man in his 60s who presented with intermittent shortness of breath and chest pressure over the past few days. This was his initial ECG.

This ECG shows a regular narrow complex tachycardia around 200 bpm, without P waves, with marked ST elevation in inferior leads and ST depression in anterior leads and aVL. The cause was thought to be atrial flutter from newly started flecainide. He also underwent angiography and had stents inserted to the left circumflex and right coronary arteries.

In the ECGquest archives, this ECG has been tagged with: - Chest pain Palpitations Extreme tachycardia Left Axis Deviation Regular Tachycardia Wide QRS Wide complex tachycardia 12-Lead ECG of the Week Dr John Larkin CC-BY-NC-SA
ECG of the Week – 13th August 2018 – Interpretation

This ECG is from a man in his 70s who presented with chest pain and palpitations on a background of hypertension and hypercholesterolaemia.