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

Figure 1 Graphics and statistical significance for paired t-test analyses for related samples. A: Heart rate (bpm); B: PR interval (ms); C: QRS duration (ms); D: QTc interval (ms). The dark dots are individual values of each single patient. Triangles represent mean values, shown in Table 2. Electrocardiograms (ECG) A represents ECG at admission; ECG B was performed at peak hypothermia and ECG C was recorded after rewarming.

Figure 2 Electrocardiograms in lead II from the same patient. Reversible prolongation of all electrocardiograms (ECG) intervals may be observed. A: ECG at admission, core temperature was 35.9 °C; B: ECG at peak hypothermia, 33 °C. Osborn or J wave is marked with a black arrow; C: ECG after rewarming, core temperature was 36.4 °C.