Fig. 4.

Representative tracing of the telemetry record in the pigs (A). Spontaneous coronary spasm with a decrease of coronary blood flow and ischemic ST-segment change occurred in the conscious pigs (B). ECG1, 2: electrocardiogram 1 (basal site of left ventricle), 2 (apex site of left ventricle) from cardiac surface leads. BP: blood pressure recorded from the catheter inserted in the intrathoratic artery, CBF: coronary blood flow in the left anterior descending coronary artery, which was recorded using a telemetric Doppler flow meter.