ECGLab beat review

Note for this beat

Saved with your answer to this beat.

The answers (AAMI EC57 classes)

N Normal

Sinus beats, left and right bundle branch block beats, atrial and junctional escape beats

S Supraventricular

Atrial premature (also aberrated), junctional premature, other supraventricular premature beats

V Ventricular

Premature ventricular contractions (also R-on-T), ventricular escape beats

F Fusion

Fusion of a ventricular and a normal beat

Q Unclassifiable

A real beat no class fits better; paced beats, fusion of paced and normal

X Not a beat

The mark lies on no QRS: artifact or noise taken for a beat, or a beat counted twice

Label each beat by its origin: beats of an atrial run or atrial bigeminy are S; beats conducted in atrial fibrillation or flutter are N. Unsure between two: the more likely, and a note. Too noisy to read: Q if a QRS is there, X if none is. No class of any beat is shown, by design.

The beat to classify is in the blue band; small ticks mark the other beats, RR intervals are in ms. Drag to move, pinch to zoom, double-tap to centre. Grid: 0.2 s by 0.5 mV, fine lines 0.04 s by 0.1 mV. Keys: N S V F Q X answer, Backspace back, ← → previous and next, Z 30 s, C centre, + − gain, / note.