Vascular antispastic medication should take priority over other antihypertensives after coronary artery bypass...

Area of Science:

• Cardiovascular Surgery
• Vascular Biology
• Pharmacology

Background:

• Radial artery grafts are increasingly used for coronary artery bypass grafting (CABG) due to superior long-term patency compared to saphenous vein grafts.
• The inherent muscular nature of radial arteries raises concerns about potential vasospasm, necessitating vasodilator use.
• Managing postoperative vasospasm in radial artery grafts can be challenging, especially in hypotensive patients previously on antihypertensives.

Observation:

• A patient undergoing CABG with a radial artery graft presented with hypotension postoperatively and did not receive prophylactic vasodilators.
• The patient subsequently developed significant vasospasm of the radial artery conduit.
• Intraoperative direct intra-arterial vasodilator administration failed to resolve the vasospasm.

Findings:

• The radial artery vasospasm resolved after the patient was initiated on oral vasodilators.
• Sustained oral vasodilator therapy for four weeks led to the recovery of the radial artery conduit.

Implications:

• This case highlights the potential efficacy of oral vasodilators in managing refractory radial artery vasospasm post-CABG.
• It suggests that oral vasodilators may be a viable treatment option for radial artery graft vasospasm, even when direct interventions are ineffective.
• Further research into optimal vasodilator strategies for radial artery conduits in specific patient populations is warranted.