Figure 4
From: Hypertensive crisis-induced electrocardiographic changes: a case series
(a) Electrocardiogram recordings obtained (at normal standardization, 10 mm = 1 mV) from a male patient, depicting tall symmetric T-wave (seen in V3 to V5) associated with prolonged PR interval as seen in leads II, III and aVF (arrows), during a hypertensive crisis episode. (b) Tracings a and c demonstrate normal electrical cardiac activities at pre-dose (before tyramine administration) and post blood pressure normalization time points, respectively.