Continuous monitoring of the ECG is mandatory as β-adrenergic receptor antagonist which is used as a premedication increases risk of bradyarrythemia. Capnography and pulse oximetry should be regarded as mandatory during induced hypotension. Monitoring of central venous pressure is not routine. Blood gases are helpful to determine adequate oxygenation and ventilation Complications are rare. The elderly and those with underlying organ dysfunction are probably at higher risk. Therefore, the anesthesiologist must assess each patient carefully so that the decision to use deliberate hypotension is based on reason. The intelligent use of deliberate hypotension has distinct advantages.Complications are prevented by adequate monitoring, ventilation, positioning, limiting the extent and duration of hypotension and by proper patient selection.