Figure 5.

Representative diagrams of the electrocardiography (ECG) data and arterial blood pressure data in rats following a cardiac arrest, cardiopulmonary resuscitation and return of spontaneous circulation. (A) Third-degree AV block or complete heart block was as seen in numerous occasions in rats treated with DHC only causing a marked bradycardia and hypotension. (B) Normal ECG as seen in animals pre-treated with atropine.