Related Experiment Videos
Emergency coronary angioplasty in refractory unstable angina
Insights
Emergency percutaneous transluminal coronary angioplasty offers a viable treatment for unstable angina refractory to medication. This procedure showed a high initial success rate with significant long-term functional improvement in selected patients.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Unstable angina pectoris (UAP) refractory to maximal pharmacologic therapy presents a significant clinical challenge.
- Current treatment guidelines often involve escalating medical management, but a subset of patients remains symptomatic.
Purpose of the Study:
- To evaluate the efficacy and safety of emergency percutaneous transluminal coronary angioplasty (PTCA) in patients with refractory UAP.
- To assess the long-term outcomes, including restenosis and functional status, following emergency PTCA.
Main Methods:
- A prospective study involving 60 patients with UAP unresponsive to beta-blockers, calcium antagonists, and nitroglycerin.
- Emergency PTCA was performed, with follow-up including clinical assessment, exercise testing, and thallium isotope studies for functional evaluation.
- Repeat angiography was performed in a subset of patients to assess restenosis rates.
Main Results:
- The initial success rate for emergency PTCA was 93% (56 out of 60 patients).
- No procedure-related deaths occurred; however, four patients experienced total occlusion and myocardial infarction despite bypass grafting.
- At six-month follow-up, 80% of patients demonstrated improved cardiac functional status with normal exercise capacity and no ischemia. The restenosis rate was 28% in patients who underwent repeat angiography.
Conclusions:
- Emergency PTCA is a potentially beneficial intervention for carefully selected patients with unstable angina pectoris that does not respond to intensive medical treatment.
- The procedure can lead to significant improvements in cardiac function and symptom relief in the majority of successfully treated patients.
Abstract:
We performed percutaneous transluminal coronary angioplasty as an emergency procedure in 60 patients with unstable angina pectoris that was refractory to treatment with maximally tolerated doses of beta-blockers, calcium antagonists, and intravenous nitroglycerin. The initial success rate for angioplasty was 93 per cent (56 patients). There were no deaths related to the procedure, although total occlusion occurred in four patients. Despite emergency bypass grafting, all four sustained a myocardial infarction. All the patients were followed for at least six months. Late cardiac death occurred in one patient, whereas eight had recurrent angina pectoris. There was no progression to myocardial infarction. The restenosis rate was 28 per cent (13 of 46) in the patients with initially successful coronary angioplasty who had repeat angiography. Improved cardiac functional status after sustained successful coronary angioplasty was demonstrated by an almost normal capacity on bicycle exercise testing and the absence of ischemia during thallium isotope studies in 80 per cent. We conclude that emergency percutaneous transluminal coronary angioplasty may be useful for the treatment of selected patients with unstable angina pectoris who are unresponsive to intensive pharmacologic treatment.