Sanjay Theodore

Long-Term Patency of 1108 Radial Arterial-Coronary Angiograms Over 10 Years

BACKGROUND To avoid late vein graft atheroma and failure, we have used arterial grafts extensively in coronary operations. The radial artery (RA) is the conduit of second choice. This study determined the long-term patency of the RA as a coronary graft. METHODS Two independent observers evaluated 1108 consecutive postoperative RA conduit angiograms performed between January 1997 and June 2007 for cardiac symptoms. Mean time to postoperative angiography was 48.3 months (range, 1 to 132 months). An RA graft was considered failed (nonpatent) if there was stenosis exceeding 60%, string sign, or occlusion. Patency was determined over time, by coronary territory grafted and by the degree of native coronary artery stenosis (NCAS). RESULTS At a mean of 48.3 months, 982 of the 1108 RA grafts (89%) were patent. RA patencies for the left anterior descending were 96% (24 of 25), diagonal/intermediate, 90% (121 of 135); circumflex marginal, 89% (499 of 561); right coronary, 83% (38 of 46); posterior descending, 89% (253 of 286); and left ventricular branch/posterolateral, 86% (47 of 55). Patency was 87.5% (56 of 64) for NCAS of less than 60% compared with 89% (926 of 1044; p = 0.89) for NCAS exceeding 60%. Of 318 RAs in place more than 5 years, 294 (92.5%) were patent, and for 107 RAs in place for more than 7 years, 99 were patent (92.5%). Patency was consistent through each year of the decade. Mechanisms of failure did not involve development of atherosclerosis. Patent RA grafts were smooth, with no angiographic evidence of atheroma. CONCLUSIONS Late patencies of RA grafts are excellent and justify continuing use of the RA in coronary operations.

Contemporary Results Show Repeat Coronary Artery Bypass Grafting Remains a Risk Factor for Operative Mortality

BACKGROUND Reoperative coronary artery bypass grafting (redo CABG) shows improving outcomes, but with varying degrees of improvement. We assessed contemporary outcomes after redo CABG to determine if redo status is still a risk factor for early postoperative complications and midterm survival. METHODS Isolated CABG procedures (June 1, 2001 to May 31, 2008) within the Australasian Society of Cardiac and Thoracic Surgeons Cardiac Surgery Database were included. Redo status as a predictor for early outcomes was assessed with logistic regression analysis. Midterm survival was determined from the National Death Index. Effect of redo status on midterm survival was assessed using a Cox proportional hazards model. RESULTS Inclusion criteria were met by 13,436 patients, and 458 (3.4%) underwent redo CABG. Operative mortality was 4.8% for redo CABG and 1.8% for first-time CABG (p < 0.001). After adjustment, redo status remained a predictor for operative mortality (odds ratio [OR], 2.1; 95% confidence interval [CI], 1.3 to 3.6), myocardial infarction (OR, 2.8; 95% CI, 1.6 to 6.0), and prolonged ventilation (OR, 1.5; 95% CI, 1.1 to 2.0). Unadjusted survival was lower for the redo CABG group vs the first-time CABG group at up to 6 years (p = 0.01, log-rank test. After adjusting for differences in patient variables, redo status was not a predictor of midterm survival (OR, 1.03; 95% CI, 0.78 to 1.35; p = 0.85). CONCLUSIONS Early postoperative outcomes of redo CABG are encouraging. Midterm survival is excellent; however, redo remains a significant risk factor for operative mortality in contemporary practice.

Surgical Management of Invasive Pulmonary Fungal Infection in Hematology Patients

BACKGROUND The purpose of this study was to analyze our institutional results with pulmonary resection in neutropenic patients with hematologic malignancies and suspected invasive pulmonary fungal infections. METHODS We performed a retrospective medical record review of 25 immunocompromised patients with hematologic malignancies who underwent pulmonary resection between 2000 and 2007. We analyzed preoperative diagnostic technique, degree of pulmonary resection, and postoperative morbidity and mortality to determine whether surgery is a viable treatment option in this subset of patients. RESULTS Twenty-three of 25 patients had a minithoracotomy compared with 2 who had video-assisted thorascopic surgery resection only. Thirteen had wedge resections, 9 had lobectomies, and 3 had segmentectomies. Early surgical morbidity was 2 of 25, involving 1 pneumothorax and 1 empyema. In-hospital mortality was 2, with 1 death primarily related to surgery. Median survival was 342 days, and survival was significantly better in patients with only one lesion. No patient experienced late recurrence of invasive pulmonary fungal infection. Resected pulmonary tissue also provided the best chance for a proven diagnosis in 19 of 25 (76%). CONCLUSIONS This study confirms that pulmonary resection in high-risk immunocompromised patients with suspected invasive fungal infection can be carried out with excellent operative morbidity and mortality.

Safe use of recombinant activated factor VIIa for recalcitrant postoperative haemorrhage in cardiac surgery.

The aim of this case series is to review the effect of recombinant activated factor VIIa (rFVIIa) on refractory haemorrhage, despite aggressive treatment with conventional blood products and medications at our institution. All patients undergoing cardiac surgery who received rFVIIa as rescue therapy for persistent uncontrollable haemorrhage were studied. We examined coagulation immediately before and after rFVIIa was given; international normalized ratio (INR), activated partial thromboplastin (APTT) fibrinogen and platelet levels, in addition to the use of red cell and non-red cell blood products, morbidity and mortality. Thirty patients (0.6%) received 31 doses of rFVIIa for bleeding refractory to conventional treatment. Twenty received rFVIIa in theatre after primary surgery, three after re-exploration and eight in the intensive care unit (ICU). Hospital mortality was 6.5% (2/30) and there were no documented thromboembolic phenomena. There was significant reduction in red blood cell and product transfusion before and after rFVIIa administration (P<0.001). There was significant correction in coagulation parameters after rFVIIa. Recombinant FVIIa appears to be safe, and is effective in reducing red blood cell and product transfusion requirements and may impact on early and late outcomes in this small complex subgroup of patients.

Implications for Cardiac Surgery in Patients With Factor XII Deficiency

Factor XII deficiency is associated with a prolonged activated partial thromboplastin time and activated clotting time used for monitoring during cardiopulmonary bypass. It does not predispose to an increased risk of bleeding. We present the strategy used for a case of coronary artery bypass grafting in a patient with factor XII deficiency, followed by a brief discussion of the important clinical considerations when patients with factor XII deficiency undergo cardiac surgery. Monitoring of heparin and the avoidance of anti-fibrinolytic agents are the main intraoperative issues. Postoperative care must include careful thromboembolic prophylaxis and vigilance against infection.

Late Presentation Digital Ischemia After Radial Artery Harvest for Coronary Artery Bypass

The radial artery is increasingly being used as a coronary artery bypass graft. Morbidity from harvesting is rare, yet it does occur. We present a case of digital ischemia presenting late after surgery and suggest that although preoperative assessment may be normal, comorbidities such as collagen vascular disease in conjunction with atherosclerotic peripheral vascular disease should be carefully considered as a contraindication to radial artery harvest.

Diffuse coronary artery spasm treated by extracorporeal membrane oxygenation.

Diffuse coronary vasospasm is an unpredictable and serious complication following coronary artery bypass surgery. The treatment of this emergency is dependent on patient suitability for angiography and direct injection of vasodilators into the affected vessels. In patients unable to proceed to angiography the diagnosis can only be suspected but treatment is nevertheless still towards reinstitution of coronary blood flow. We present one such case in which re-grafting and extracorporeal membranous oxygenation proved successful in restoring cardiac function in a patient with diffuse coronary artery spasm.

Re-Implantation of an Anomalous Right Coronary Artery Arising from the Left Coronary Sinus and Coursing between the Great Arteries

Abstract  The patient with a coronary artery anomaly remains a treatment dilemma. We present a 62‐year‐old woman who underwent re‐implantation of her anomalous right coronary artery (ARCA) from the left coronary sinus and describe our techniques according to potential anatomic variations of ARCA. The ARCA from the left coronary sinus is increasingly being recognized as a cause of angina, acute myocardial infarction, syncope, and sudden death. We describe a case that was treated by direct coronary artery re‐implantation into the right coronary sinus and suggest that this technique be the first considered when planning surgical correction.

Pulmonary hypertension alters natural history of anomalous left coronary artery.

A girl who was diagnosed at 8 months old with anomalous left coronary artery from the pulmonary artery and was subsequently lost to follow-up, presented at the age of 11 years with congestive heart failure and severe mitral regurgitation with supra-systemic pulmonary artery pressure. With progressive mitral regurgitation, coronary steal is reduced by the rising pulmonary artery pressure, and patients present late with severe valvular cardiomyopathy.

Cutaneous Microangiopathic Thrombosis Complicated by Pyoderma Gangrenosum in Post-Cardiac Surgery Heparin-Induced Thrombocytopaenia

Thrombotic cutaneous gangrene is a rare complication of heparin-induced thrombocytopaenia after cardiac surgery. We report a case and discuss management issues with cardiopulmonary bypass for cardiac surgery in this condition.