The purpose of this study is to investigate the type of the cardiac disease using transthoracic echocardiography in patients whose preoperative electrocardiography shows the intraventricular conduction delay.
Study Type
OBSERVATIONAL
Enrollment
100
presence of cardiac disease
Transthoracic echocardiography will be performed to investigate the evidence of the cardiac disease after the induction of general anesthesia and before the start of the surgery.
Time frame: Within 1 hour after the induction of general anesthesia
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