Preparation of the patient for any surgical operation after heart valve prosthetics following procedures must be performed on:
A. Usage of Phenilin discontinued, Heparin started
B. All anticoagulants and antiagregants must be canceled
C. Stopping to use Phenilin 4 - 5 weeks before operation
D. Special events are not required
E. Glycosides and antiarrhythmics must be started
Answer: A. Usage of Phrenilin discontinued, Heparin started