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[Coronary arteriography in the threatened infarction syndrome]
Insights
Coronary arteriography is a safe procedure for threatened myocardial infarction, with low risks even in acute settings. This diagnostic tool helps identify operable coronary artery disease and guides urgent surgical interventions when necessary.
Area of Science:
- Cardiology
- Interventional Cardiology
Background:
- Threatened myocardial infarction presents significant risks.
- Coronary arteriography is a key diagnostic tool in cardiology.
Purpose of the Study:
- To evaluate the safety and efficacy of coronary arteriography in patients with threatened myocardial infarction.
- To assess the diagnostic yield and operability criteria from coronary arteriography in this patient cohort.
Main Methods:
- A retrospective analysis of 66 coronary arteriography procedures performed during threatened infarction over 18 months.
- Evaluation of immediate sequelae, including mortality and myocardial infarction.
- Assessment of coronary lesion distribution, collateral circulation, ventriculography findings, and ventricular ejection fraction.
Main Results:
- No immediate deaths occurred; three myocardial infarctions were observed.
- Coronary artery lesions were frequent, affecting all three trunks in 47% of cases.
- Operability criteria were met in 58% of patients, with 23% showing collateral circulation.
Conclusions:
- Coronary arteriography is justifiable and safe in threatened myocardial infarction, even when performed early.
- The procedure provides crucial information for surgical decision-making, potentially leading to urgent intervention.
- Timing of the procedure, ideally several days after pain cessation, can optimize outcomes.
Abstract:
Although greater than in patients with stabilised coronary insufficiency, the risks of carrying out coronary arteriography during the period of a threatened infarction are still modest in the hands of an experienced team. In a series of 66 such investigations under these conditions over an 18 month period, there were no deaths as immediate sequelae. Three myocardial infarctions occurred, one of which was probably encouraged by ceasing the propranolol prior to arteriography. Analysis of the results confirms the frequency of lesions affecting all three trunks (47% of cases), the anterior descending branch being the most commonly affected. A collateral circulation was established in 23% of cases. Ventriculography was normal in one third of cases. The mean value for the ventricular ejection fraction was 0.57 over the entire series. In 58% of cases, all the arteriographic and ventriculographic criteria of operability were satisfied. It therefore appears that coronary arteriography is justifiable during the period of threatened infarction; it may be undertaken at an early stage if the angina does not respond to medical treatment. It is always best to carry it out several days after cessation of the pain where possible. The investigation may lead to urgent surgical intervention.