Fig. 1.  Composite display of vital signs (A ) and key events (B ) in 14 cases of cardiac arrest during spinal anesthesia. Events are shown in relation to the first clue of impending cardiac arrest (located at 0 min on the time scale). The values for systolic blood pressure (closed circles ), diastolic blood pressure (closed triangles ), and heart rate (open circles ) are mean ± SD. *P < 0.05 versus  hospital admission values. Used with permission, from Caplan RA, Ward RJ, Posner K, Cheney FW: Unexpected cardiac arrest during spinal anesthesia: A closed claims analysis of predisposing factors. Anesthesiology 1988; 68:5–11.

Fig. 1.  Composite display of vital signs (A ) and key events (B ) in 14 cases of cardiac arrest during spinal anesthesia. Events are shown in relation to the first clue of impending cardiac arrest (located at 0 min on the time scale). The values for systolic blood pressure (closed circles ), diastolic blood pressure (closed triangles ), and heart rate (open circles ) are mean ± SD. *P < 0.05 versus  hospital admission values. Used with permission, from Caplan RA, Ward RJ, Posner K, Cheney FW: Unexpected cardiac arrest during spinal anesthesia: A closed claims analysis of predisposing factors. Anesthesiology 1988; 68:5–11.

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