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PTCA of the left coronary artery when the right coronary artery is chronically occluded
P Teirstein1, L Giorgi, W Johnson
1Mid American Heart Institute, Saint Luke's Hospital, Kansas City, MO.
Insights
Left coronary artery angioplasty is safe for patients with chronic total occlusion of the right coronary artery (CLOSED RCA). However, these patients frequently experience continued anginal symptoms post-procedure.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Chronic total occlusion (CTO) of the right coronary artery (RCA) presents unique challenges in coronary artery disease management.
- Left coronary artery interventions are common, but outcomes in patients with concurrent CTO-RCA are less understood.
Purpose of the Study:
- To evaluate the safety and efficacy of left coronary artery angioplasty in patients with CTO-RCA compared to those with open RCA.
- To assess procedural complications, long-term survival, and clinical outcomes, including anginal symptoms.
Main Methods:
- Retrospective analysis of 65 patients with CTO-RCA and 105 patients with open RCA undergoing left coronary artery angioplasty.
- Comparison of baseline characteristics, procedural outcomes, and late follow-up data (mean 17 months).
- Assessment of survival, major adverse cardiac events, and angina status.
Main Results:
- Procedural complications were low in both groups, with one death in the CTO-RCA group and one emergency bypass in the open RCA group.
- No significant difference in long-term survival (95% vs. 93%) between the groups.
- Higher incidence of late cardiac events (26% vs. 16%) and persistent angina (39% vs. 16%) in the CTO-RCA group.
Conclusions:
- Left coronary artery angioplasty can be safely performed in patients with CTO-RCA.
- Patients with CTO-RCA undergoing left coronary artery angioplasty have a higher likelihood of persistent angina post-procedure.
- Further strategies may be needed to improve symptom relief in this patient cohort.
Abstract:
Angioplasty of the left coronary artery was undertaken in 65 patients with a chronic total occlusion of the right coronary artery (CLOSED RCA) and in 105 patients with no significant disease in the right coronary artery (OPEN RCA). No patient had attempted dilatation of the right coronary artery. CLOSED RCA versus OPEN RCA patients differed with respect to presence of poor left ventricular (LV) function (12% versus 4%, p = 0.07), number of stenoses per patient (2.2 versus 1.8, p less than 0.05), and stenoses in both left anterior descending and left circumflex artery (39% versus 23%, p less than 0.05). Procedural complications were low for both CLOSED RCA (one death) and OPEN RCA (one emergency bypass surgery) patients. At late follow-up (mean = 17 months), there was no difference in survival between CLOSED RCA and OPEN RCA patients (95% versus 93%, p = NS). Late cardiac events (death, bypass surgery, or myocardial infarction) occurred in 26% of CLOSED RCA patients and in 16% of OPEN RCA patients (p = ns). The absence of angina at follow-up was more frequent in OPEN RCA compared with CLOSED RCA patients (84% versus 61%, p less than 0.01). Angioplasty of the left coronary artery can be performed in CLOSED RCA patients without excessive procedural risk; however, at follow-up continued anginal symptoms are common.