Electrocardiographic changes during induced therapeutic hypothermia in comatose survivors after cardiac arrest

Table 3 Changes in ST segment and T wave, represented as means, standard deviation (in brackets) and P for difference

	Admission(ECG A)	During MTH(ECG B)	After MTH(ECG C)	P for difference(A to B)	P for difference(B to C)	P for difference(A to C)
ST deviation lead II	+ 0.05 (1.4)	- 0.20 (1.4)	- 0.12 (0.7)	0.2	0.3	0.4
ST deviation lead v2	+ 0.39 (3.2)	+ 0.08 (0.6)	+ 0.32 (1.0)	0.4	0.06	0.9
ST deviation lead v5	- 0.25 (1.9)	- 0.38 (0.8)	- 0.16 (0.8)	0.6	0.036a	0.7
T wave lead II	+ 1.0 (1.8)	+ 0.63 (1.1)	+ 0.38 (1.2)	0.2	0.1	0.036a
T wave lead v2	+ 2.0 (3.6)	+ 2.10 (3.2)	+ 1.62 (2.4)	0.8	0.3	0.5
T wave lead v5	+ 1.60 (2.9)	+ 0.84 (2.3)	+ 0.04 (2.4)	0.1	0.013a	< 0.0005a

Indicates statistical significance (^aP < 0.05). Units are millivolts. +: ST segment elevation or T-wave positive deflection; -: Descent in ST segment or T-wave negative deflection.