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[Prognosis of spontaneous occlusions in tight coronary stenosis]
T Oswald1, N Danchin, A Terrier de la Chaise
1Service de Cardiologie A, Hôpital de Brabois, Vandoeuvre-lès-Nancy.
Insights
Sudden complete obstruction after coronary angioplasty is uncommon. Collateral circulation significantly improves outcomes, preventing myocardial infarction in most cases.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Radiology
Context:
- Coronary angioplasty is a common procedure for treating coronary artery disease.
- Rapid complete obstruction of the dilated vessel is a potential complication.
- Understanding factors influencing outcomes after such events is crucial for patient management.
Purpose:
- To report the clinical, biochemical, angiographic, and angio-scintigraphic findings in patients experiencing rapid complete obstruction post-coronary angioplasty.
- To evaluate the short-term course and prognosis of these patients.
- To identify factors associated with favorable outcomes.
Summary:
- Eighteen of 408 patients undergoing coronary angioplasty developed rapid complete vessel obstruction.
- The interval between angiographies was 67 ± 66 days; lesions were typically severe (86 ± 7% stenosis).
- Despite obstruction, 61% of patients had favorable outcomes, with 5 achieving complete symptom remission; collateral circulation was a key prognostic factor. Myocardial infarction was rare.
Impact:
- Highlights the importance of collateral circulation in mitigating adverse events following acute coronary vessel obstruction.
- Suggests that prompt identification and assessment of collateralization may guide therapeutic strategies.
- Provides insights into the natural history and prognosis of a specific complication of coronary angioplasty.
Abstract:
Eighteen out of 408 patients assigned to coronary angioplasty rapidly developed complete obstruction of the vessel to be dilated. The results of a retrospective study of clinical, biochemical, angiographic and/or angio-scintigraphic events in these 18 patients are reported. The interval between the two coronary arteriographies was 67 +/- 66 days. Angina was initially unstable in 9 patients and stable in 6; 3 patients were asymptomatic. Coronary lesions followed the usual distribution pattern: the left anterior descending artery was involved in 11 cases, the circumflex artery in 4 cases and the right coronary artery in 3 cases. Overall, the degree of stenosis was high (86 +/- 7%); Following obstruction the course of the disease was favourable in 11 patients (61%), with complete remission of all symptoms in 5. Six patients remained with unstable angina. Apart from one case of sudden death, none of the patients developed myocardial infarction, as shown by the absence of significant biochemical, electrical and angiographic changes. The importance of pre-existing or newly developed collateral circulation as a good prognosis factor is highlighted.