Twenty-four-hour ambulatory electrocardiography characterization of heart rhythm in Vipera berus-envenomed dogs

Table 3 Selected 24-h ambulatory electrocardiography variables derived from eight Vipera berus-envenomed dogs with pathologic arrhythmias

Variables 24-AECG	Median	IQR
Total number of QRS complexes	117,861	102,484–134,638
Maximum HR (BPM)	196	189–200
Minimum HR (BPM)	39.5	36–44.5
Average HR (BPM)	83.5	76.25–88.5
Single VPC	670	277–1626
Couplet VPC	155	55.5–416
Episodes of VT	200	33–331
Total number of VPCs in episodes of VT	3503	703–5720
Episodes of IVR	52	25.5–151
Total number of complexes in episodes of IVR	152	68–284
Total number of ventricular depolarizations	5241	1554–8059
Episodes of “R-on-T phenomenon”	0	0–4.8

Total number of ventricular depolarizations is defined as the sum of single and couplet VPCs, number of VPCs in episodes of VT, and number of complexes in episodes of IVR
24-AECG 24-h ambulatory ECG, IQR interquartile range, HR heart rate, BPM beats per minute, VPC ventricular premature complex, VT ventricular tachycardia, IVR idioventricular rhythm

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