Key result
Non-obstructive coronary arteries in STEMI trend toward lower mortality and incident heart failure versus obstructive disease.
Why the study?
The clinical characteristics and prognosis of ST elevation myocardial infarction patients with non-obstructive coronary arteries (NOCA) compared to those with obstructive coronary arteries (OCA) were not well defined.
How do clinical characteristics and outcomes differ between ST elevation myocardial infarction patients with non-obstructive versus obstructive coronary arteries?
Observational (n=598)
Yes
How do clinical characteristics and outcomes differ between ST elevation myocardial infarction patients with non-obstructive versus obstructive coronary arteries?
Patients with ST-elevation ACS and non-obstructive coronary arteries have a better prognosis and different clinical presentation compared to those with obstructive disease, highlighting the need for individualized management.
Caution against practice change in non-obstructive STEMI; leaves open confirmation of outcome differences in larger prospective cohorts.
Material and methods . The data used, from the acute coronary syndrome registry RECORD-3, in the emergency cardiology department of Tomsk SRI of Cardiology, together with another 51 center in Russia. Based on the absence of presence of NOCA, patients with ST elevation myocardial infarction, who had undergone coronary arteriography, were selected to two independent groups: 27 with NOCA and 571 with OCA. Results. There were no significant differences in the clinical portrait of NOCA and OCA patient. However, palpitation followed angina attack in NOCA patients. In the NOCA, there was significantly lower number of persons with diagnostically relevant raise of cardio specific enzymes. Indirectly, it points on temporary ischemia with no necrosis, or that the area of necrotic myocardium is not large. In NOCA patients, statistically more significantly were absent reciprocal ECG changes. Endpoints as mortality and novel heart failure development had tendency to statistically more significant decrease of prevalence in NOCA patients. As final diagnosis at discharge, in NOCA patients more often another diagnosis was mentioned (including unstable angina, etc.), but not myocardial infarction. The key issues in hospital management of these two groups were identical, except more often prescription of dihydropiridine calcium channel blockers to NOCA patients, and rarer prescription of antiplatelet drugs at discharge. Conclusion. Regardless the fact that prognosis in ACS with NOCA and intact arteries is better than in OCA, it is necessary to analyze thoroughly pathogenesis of the disease in every case, as in this category of patients especially, it is most heterogenic. As these patients have comorbid factors, it is necessary to select the leading one, and to intensify efforts on this factor directly.
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Ryabov et al. (2017) conducted an observational in ST elevation acute coronary syndrome (n=598). Non-obstructive coronary arteries (NOCA) vs. Obstructive coronary arteries (OCA) was evaluated on Mortality and novel heart failure development. Among 598 patients with ST elevation myocardial infarction, the 27 with non-obstructive coronary arteries had a tendency toward decreased mortality and novel heart failure compared to those with obstructive lesions.
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