- Propranolol (Deralin) - patients will receive a low dose of 40 mg/day (4X10mg) starting two days before surgery (immediately following the first blood draw) until the evening of surgery. The first dose will be given under supervision (described later). On the morning of surgery, a single tablet of propranolol XL 80mg will be administered together with other pre-medication drugs, and will be continued once daily for three days after surgery. Pulse and blood pressure will be monitored during the first day of treatment, during the day of surgery and on the following days until discharge from the hospital. If pulse decreases to <50/min or blood pressure decreases to <100 systolic - the dose will be halved.