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. 2024 Jan 24;10:e1774. doi: 10.7717/peerj-cs.1774

Table 2. Beats and classes of the heart’s rate.

Heartbeat classes at AAMI The rhythm subjects at MIT-BIH Count of available beats
Normal beats (N) N (Beats of normal) 74,776
L (Left bundle branch of block) 8,052
R (Right bundle branch of block) 7,239
j (beats at escape nodal (junction)) 229
e (beat of escape atrial escape ) 16
Beats of supraventricular (S) A (atrial premature beat) 2,528
S (premature supraventricular beat) 2
J (premature nodal (junctional) beat) 83
Beats ventricular (V) ! (ventricular flutter beat) 472
V (ventricular premature contraction) 7,115
E (beat of ventricular escape ) 106
[ (ventricular flutter fibrillation start) 6
] (ventricular fibrillation flutter end) 149
Beats (F) F (beats of ventricular fusion normal ) 106
Beats unknown (Q) f (Fusion beats of paced and normal ) 979
/ (beat Paced ) 7,001
Q (beats Unclassifiable ) 33