Journal
EUROPACE
Volume 11, Issue 9, Pages 1183-1187Publisher
OXFORD UNIV PRESS
DOI: 10.1093/europace/eup212
Keywords
Mechanical heart valve; Anticoagulation; Pacemaker implantation
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This study was to evaluate perioperative anticoagulation therapy in patients with mechanic heart valve(s) undergoing pacemaker implantation. A total of 109 patients with mechanical heart valve(s) undertaking pacemaker implantation were studied. Fifty-one patients with warfarin suspended 3 days before surgery were classified into Group 1 and 58 patients with warfarin suspended < 3 days or not at all into Group 2. The perioperative incidence of complications was compared. Suspension of warfarin < 3 days before surgery was associated with a higher incidence of excessive haemorrhage (16/51 vs. 5/58, P = 0.003). Patients with pocket haematoma were more likely to have been treated with post-operation heparin (60% vs. 17.3%, P = 0.032). In 42 patients treated with proposed protocol of perioperative anticoagulation, no pocket haematoma or embolism occurred. A minimum of 3 days cessation of warfarin prior to surgery is preferred. Low-molecular-weight heparin should not be used for at least 3 days post-surgery. We propose that the protocol of perioperative anticoagulation be a suspension of warfarin not < 3 days with low-molecular-weight heparin bridging stopped 12 h before surgery, and warfarin rather than low-molecular-weight heparin initiated immediately after surgery.
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