Table 1. Changes in ECG parameters upon... | Rockefeller University Press

Table 1.

Changes in ECG parameters upon heating in individual pythons measured with open chest

	HR (bpm)		PR (ms)		QRS (ms)		QT (ms)		T-wave inversion
	25°C	36°C	25°C	36°C	25°C	36°C	25°C	36°C	In lead	At (°C)
Python 1	35	96	319	132	72	58	1,271	475	aVF	27
Python 2	55	118	769	351	108	49	822	380	II	28
Python 3	30	65	485	226	96	70	931	515	All leads	33
Python 5	22	32	593	394	122	100	2,110	1,440	III	34
Python 6	34	73	339	212	93	51	1,391	362	III, aVF	34
Average (ms)	35	77^a	501	263^a	98	66^a	1,305	634^a
SEM	6	15	84	48	8	9	227	203

	HR (bpm)		PR (ms)		QRS (ms)		QT (ms)		T-wave inversion
	25°C	36°C	25°C	36°C	25°C	36°C	25°C	36°C	In lead	At (°C)
Python 1	35	96	319	132	72	58	1,271	475	aVF	27
Python 2	55	118	769	351	108	49	822	380	II	28
Python 3	30	65	485	226	96	70	931	515	All leads	33
Python 5	22	32	593	394	122	100	2,110	1,440	III	34
Python 6	34	73	339	212	93	51	1,391	362	III, aVF	34
Average (ms)	35	77^a	501	263^a	98	66^a	1,305	634^a
SEM	6	15	84	48	8	9	227	203

Pythons were heated from 25°C (before) to 35°C (after). The T-wave inversion column shows the leads in which the T-wave inverted and the temperature when this occurred.

P < 0.05, paired t test.

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