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Preoperative cardiac screening before peripheral vascular operations
Insights
Radionuclide angiography (RNA) effectively identifies cardiac risk before peripheral vascular operations. Patients with normal RNA had no myocardial infarctions, suggesting routine coronary angiography may be unnecessary.
Area of Science:
- Cardiology
- Vascular Surgery
- Diagnostic Imaging
Background:
- Myocardial infarction is a significant cause of death and complications following peripheral vascular surgery.
- Accurate preoperative cardiac risk assessment is crucial for patient outcomes.
Purpose of the Study:
- To evaluate the utility of radionuclide angiography (RNA) in assessing cardiac risk in patients undergoing peripheral vascular operations.
- To determine if RNA can guide decisions regarding further cardiac interventions.
Main Methods:
- Seventy-eight patients undergoing peripheral vascular operations were assessed using radionuclide angiography (RNA).
- Abnormal RNA findings prompted further investigation, including coronary angiography in 27 patients.
- Surgical plans were modified in 11 patients based on RNA results.
Main Results:
- 53 out of 78 patients had abnormal RNA studies.
- No myocardial infarctions occurred in patients with normal RNA findings.
- Two fatal postoperative myocardial infarctions (2.2% mortality) occurred in patients with abnormal RNA.
Conclusions:
- Radionuclide angiography (RNA) is an effective tool for identifying cardiac risk in patients undergoing peripheral vascular surgery.
- Normal RNA results indicate a minimal risk of myocardial infarction, potentially obviating the need for routine coronary angiography.
- RNA findings can influence surgical planning and the necessity for preoperative cardiac interventions like aortocoronary bypass.
Abstract:
Myocardial infarction continues to be a major cause of morbidity and mortality after peripheral vascular operations. In this study, radionuclide angiography (RNA) of the heart was used to delineate the cardiac risk. In 78 patients, there were 53 abnormal RNA studies. Twenty-seven patients with abnormal RNA underwent coronary angiography. Six aortocoronary bypasses were performed prior to or in conjunction with the vascular operation without complications. Ninety major operations were carried out in these 78 patients. There was no myocardial infarction in patients with normal RNA. There were two postoperative fatal myocardial infarctions in patients with abnormal RNA giving a procedure mortality of 2.2 per cent. In 11 patients, the proposed operation was changed. Thirteen patients with abnormal RNA had no cardiac symptoms. Three patients in this subgroup underwent aortocoronary bypass. It was concluded that RNA can effectively identify the cardiac risk in patients undergoing peripheral vascular operations. Routine coronary angiography may be unnecessary as patients with normal RNA have minimal risk of myocardial infarction.