Hyperhomocysteinemia and restenosis.

Area of Science:

• Cardiovascular Medicine
• Clinical Chemistry

Background:

• Coronary angioplasty is a common procedure to treat coronary artery disease.
• Restenosis, the re-narrowing of the artery after angioplasty, remains a significant clinical challenge.
• Plasma homocysteine has been investigated as a potential risk factor for cardiovascular events.

Purpose of the Study:

• To evaluate the association between plasma homocysteine levels and the occurrence of angiographic restenosis six months post-coronary angioplasty.
• To identify independent risk factors for restenosis after percutaneous transluminal coronary angioplasty and stenting.

Main Methods:

• A prospective study involving 100 patients undergoing coronary angioplasty.
• Plasma homocysteine levels were measured at the time of the procedure.
• 56 patients with follow-up angiograms were analyzed, categorized into restenosis (Group A) and no-restenosis (Group B) groups.

Main Results:

• Patients with restenosis had significantly higher mean plasma homocysteine levels (15.2 mumol/l) compared to those without restenosis (11.1 mumol/l).
• The restenosis rate was substantially higher in the upper tertile of homocysteine levels (89.5%) versus the lower tertile (47.4%).
• Elevated homocysteine remained a significant independent risk factor for restenosis even after adjusting for multiple clinical variables.

Conclusions:

• Increased plasma homocysteine is an independent risk factor for angiographic restenosis following coronary angioplasty and stenting.
• Diabetes mellitus was also identified as an independent risk factor for restenosis.
• These findings suggest that homocysteine levels may play a crucial role in the development of restenosis.