Management of cardiac disease in the general surgical patient

Perioperative management of the rheumatoid patient

Rheumatoid arthritis is a systemic disease that can affect multiple organ systems of the body. It is a symmetrical polyarthropathy which leads to destruction of cartilage and bone. Before undertaking surgery on the rheumatoid patient, several issues need to be addressed. A thorough evaluation by a multidisciplinary team is essential to decrease any operative risks involved. This is a review of some of the systemic manifestations of rheumatoid arthritis with an emphasis on anesthesiology, and radiological consultation, and perioperative surgical management of rheumatoid drug therapy.

Preparing the medically compromised patient for surgery

Preparing the medically compromised patient for surgery requires identifying and treating preoperative risk factors and anticipating postoperative complications. Preoperative evaluation of all patients should include careful screening for bleeding disorders and prior anesthetic complications and assessment of nutritional status. In addition, patients with preexisting cardiac, pulmonary, and endocrine problems must be identified, since these problems represent the greatest risk factors for postoperative complications. Perioperative care is more effective when directed at specific organ systems. Communication among internists, anesthesiologists, and surgeons promotes optimal treatment for surgical patients with medical illness.

Determination of cardiac risk by dipyridamole-thallium imaging before peripheral vascular surgery

To evaluate the severity of coronary artery disease in patients with severe peripheral vascular disease requiring operation, we performed preoperative dipyridamole-thallium imaging in 54 stable patients with suspected coronary artery disease. Of the 54 patients, 48 had peripheral vascular surgery as scheduled without coronary angiography, of whom 8 (17 per cent) had postoperative cardiac ischemic events. The occurrence of these eight cardiac events could not have been predicted preoperatively by any clinical factors but did correlate with the presence of thallium redistribution. Eight of 16 patients with thallium redistribution had cardiac events, whereas there were no such events in 32 patients whose thallium scan either was normal or showed only persistent defects (P less than 0.0001). Six other patients also had thallium redistribution but underwent coronary angiography before vascular surgery. All had severe multivessel coronary artery disease, and four underwent coronary bypass surgery followed by uncomplicated peripheral vascular surgery. These data suggest that patients without thallium redistribution are at a low risk for postoperative ischemic events and may proceed to have vascular surgery. Patients with redistribution have a high incidence of postoperative ischemic events and should be considered for preoperative coronary angiography and myocardial revascularization in an effort to avoid postoperative myocardial ischemia and to improve survival. Dipyridamole-thallium imaging is superior to clinical assessment and is safer and less expensive than coronary angiography for the determination of cardiac risk.

The impact of coronary artery disease on carotid endarterectomy

In a series of 531 CENDX, preoperative cardiac risk was categorized by clinical criteria. Patients with CAD (history of previous MI, angina, congestive heart failure, and/or electrocardiographic evidence of CAD were selected for more invasive studies based on clinical criteria. The overall incidence of postoperative myocardial infarction was 2.5% and increased slightly to 4% in patients with symptomatic cardiac disease. More importantly, the overall mortality was 0.9% and only 3 of 13 (23%) postoperative myocardial infarctions were fatal. Neurologic complications averaged 1.4% and approximately 70% were related to preceding cardiac events. Twenty-two patients or 4% of the entire series underwent carotid endarterectomy combined with coronary artery bypass graft and this approach was associated with one death and one stroke. Therefore, we conclude that a selective approach to coronary arteriography and subsequent CABG based on clinical criteria is associated with an acceptably low mortality and cardiac morbidity.