Predominant Use of Bilateral Internal Mammary Arteries in Off-Pump Coronary Artery Bypass Surgery.

Bilateral internal mammary artery (BIMA) in coronary artery bypass grafting (CABG) has been shown to provide long-term clinical benefits over single internal mammary artery (SIMA) grafting. Nevertheless, the perceived technical complexity of the procedure and concerns about potential early postoperative complications, particularly, sternal wound infections, have led to a utilization rate of BIMA grafting of less than 5% in the United States. We systematically compared early (30-day) postoperative outcomes between the BIMA and SIMA cohorts in patients with similar baseline characteristics. A retrospective single-center study was conducted on matched patients, using stabilized inverse probability treatment weighting to mitigate bias between the 2 study cohorts. From 546 patients who underwent off-pump CABG initially identified, we examined 328 BIMA and 213 SIMA grafts from the matched samples. Despite using 60.4% BIMA grafts, we observed similar rates of 30-day overall and cardiac mortality between the BIMA and SIMA groups. The rates of 30-day postoperative complications, including superficial and deep sternal wound infections, stroke, sepsis, acute kidney injury, and cardiac arrest, were similar between the 2 groups. The rates of 30-day overall and cardiac readmission were also similar. In addition, the median length of hospital stays, intensive care unit stay, and ventilation times were similar between the 2 groups. In conclusion, our data suggest that a BIMA utilization rate of 60.4% in off-pump CABG procedures is achievable without causing any significant increment in early postoperative complications, including deep sternal wound infection.

Acute Presentation of Critical Aortic Stenosis, Cardiogenic Shock, and the "Heart Team" Approach to Management.

A 65-year-old male was admitted for cardiogenic shock (ejection fraction: 15%) with severe aortic stenosis and regurgitation. He underwent emergency angiography and mechanical circulatory support. A multidisciplinary heart team discussed treatment options. Ultimately, he underwent successful emergency surgical aortic valve replacement with recovery on extracorporeal membrane oxygenation. (Level of Difficulty: Intermediate.).

Redo surgical aortic valve replacement for prosthetic valve valve-in-valve dysfunction.

Transcatheter aortic valve replacement (TAVR) has become the preferred intervention for patients with severe aortic stenosis and significant comorbidities. This technique can also be used for failed bioprosthetic valves and is known as the valve-in-valve (ViV) procedure. Placing TAVR in a small bioprosthesis (<23 mm) can lead to delayed dysfunction of the prosthetic valve. We present a case of a late explanted ViV 8 years post-initial aortic valve replacement and coronary artery bypass grafting, and 3 years post-ViV procedure in a 76-year-old female. A video of the surgical procedure is provided.

Use of a novel bicarbonate-based Impella 5.5 purge solution in a coagulopathic patient.

The Impella 5.5 with Smart Assist (Abiomed) is a life-saving treatment option in acute heart failure which utilizes a continuous heparin purge solution to prevent thrombosis. In patients with contraindications to heparin, alternative anticoagulation strategies are required. We describe the stepwise management of anticoagulation in a coagulopathic patient with persistent cardiogenic shock following a coronary artery bypass procedure who underwent Impella 5.5 placement. A direct thrombin inhibitor-based purge solution was utilized while evaluating for heparin-induced thrombocytopenia. The use of a novel bicarbonate-based purge solution (BBPS) was successfully used due to severe coagulopathy. There were no episodes of pump thrombosis or episodes of severe bleeding on the BBPS and systemic effects of alkalosis and hypernatremia were minimal.

Off-pump myocardial revascularization with Impella 5.5-assisted for cardiogenic shock.

We report a case of Impella 5.5-assisted off-pump coronary artery bypass grafting for acute myocardial infarction with cardiogenic shock. The Impella 5.5 was placed in the left ventricle during the emergent procedure, and an off-pump coronary artery bypass grafting was successfully performed with exposure of all three walls of the heart. Our findings demonstrated the feasibility of off-pump coronary revascularization in three-vessel disease in a patient assisted with an Impella 5.5 percutaneous left ventricular assist device without displacement of the device during the entire perioperative period.

Minimally Invasive Direct Coronary Artery Bypass for the management of Anomalous Left Coronary Artery from the Right Coronary Sinus.

OBJECTIVE: Anomalous left coronary artery from the right coronary sinus (ALCA) is a known cause of sudden death. Surgical correction is recommended for all patients with interarterial course. We describe two patients who underwent surgical correction through an off pump- minimally invasive direct coronary artery bypass (MIDCAB) approach with good short- and mid-term results.

CD90 Identifies Adventitial Mesenchymal Progenitor Cells in Adult Human Medium- and Large-Sized Arteries.

Mesenchymal stem cells (MSCs) reportedly exist in a vascular niche occupying the outer adventitial layer. However, these cells have not been well characterized in vivo in medium- and large-sized arteries in humans, and their potential pathological role is unknown. To address this, healthy and diseased arterial tissues were obtained as surplus surgical specimens and freshly processed. We identified that CD90 marks a rare adventitial population that co-expresses MSC markers including PDGFRα, CD44, CD73, and CD105. However, unlike CD90, these additional markers were widely expressed by other cells. Human adventitial CD90+ cells fulfilled standard MSC criteria, including plastic adherence, spindle morphology, passage ability, colony formation, and differentiation into adipocytes, osteoblasts, and chondrocytes. Phenotypic and transcriptomic profiling, as well as adoptive transfer experiments, revealed a potential role in vascular disease pathogenesis, with the transcriptomic disease signature of these cells being represented in an aortic regulatory gene network that is operative in atherosclerosis.

SYNTAX score may predict the severity of atherosclerosis of the ascending aorta.

BACKGROUND: The objective of this study was to investigate the association of the coronary SYNTAX score with the degree of atherosclerosis of the ascending aorta in patients who underwent coronary artery bypass grafting (CABG). METHODS: A total of 152 patients (mean age 65 years, 66% male) were analyzed who underwent isolated CABG with both SYNTAX score and the intraoperative 5-point scale grading of the severity of atherosclerosis in the ascending aorta available. The patient were stratified into low, intermediate, and high SYNTAX score groups [≤22 (n=36), 22-33 (n=42), and ≥33 (n=76)]. RESULTS: The mean SYNTAX score was 31±11. Patient demographics and comorbidity were comparable in each group. The prevalence of severe atherosclerosis (Grade ≥III) in the ascending aorta was 17.5% (n=27) in the whole population and was different in each group with higher prevalence in higher score groups (8.3% vs. 9.5% vs. 26.3%, P=0.018). After adjusting for age, sex and other relevant comorbidity, SYNTAX score remained a predictor of severe atherosclerosis [adjusted OR 1.63, 95% CI: 1.01-2.62, P=0.046 (per 10 point increase); adjusted OR 5.20, 95% CI: 1.15-23.5, P=0.032 (high vs. low score)]. CONCLUSIONS: SYNTAX score was associated with the severity of atherosclerosis in the ascending aorta. Patients with high scores have a 5 times higher chance of severe disease compared to patients with low scores and should warrant preoperative and intraoperative comprehensive assessment of the ascending aorta.

Percutaneous tracheostomy can be safely performed in patients with uncorrected coagulopathy after cardiothoracic surgery.

OBJECTIVE: It is a common situation after cardiothoracic surgery that a tracheostomy is required for patients who are coagulopathic or on therapeutic anticoagulation. We present our results of percutaneous tracheostomy with uncorrected coagulopathy. METHODS: Between 2007 and 2012, a total of 149 patients in our Cardiothoracic Surgical Intensive Care Unit underwent percutaneous tracheostomy using the Ciaglia Blue Rhino system (Cook Medical, Bloomington, IN USA). The patients were divided into coagulopathic (platelets, ≤50,000; international normalized ratio of prothrombin time, ≥1.5; and/or partial thromboplastin time, ≥50) and noncoagulopathic groups. Coagulopathy, if present before percutaneous tracheostomy, was not routinely corrected. RESULTS: A total of 75 patients (49%) were coagulopathic. Twenty-one patients (14%) had two or more criteria. The coagulopathic patients had a lower platelet count [108 (106) vs 193 (111) (thousands), P < 0.001], with the lowest of 10; higher international normalized ratio of prothrombin time [1.7 (0.6) vs 1.2 (0.1), P < 0.001], with the highest of 5.3; longer partial thromboplastin time [40 (13) vs 33 (7) seconds, P < 0.001], with the longest of 85; and higher total bilirubin [4.6 (7.3) vs 1.9 (3.3) mg/dL, P = 0.005]. Patient demographics and comorbidities were comparable between the groups. No patients had overt bleeding. One coagulopathic patient (1.3%) had clinical oozing treated with packing, as opposed to zero in the noncoagulopathic patients (P = 1.00). There were no patients with posttracheostomy mediastinitis or late tracheal stenosis. CONCLUSIONS: Uncorrected coagulopathy and therapeutic anticoagulation did not increase bleeding risk for percutaneous tracheostomy in our cardiothoracic surgical patients.

Cardiac surgery in a patient with pemphigus vulgaris: anesthetic and surgical considerations.

Pemphigus vulgaris is an autoimmune disorder that causes blistering of the skin and mucous membranes. We present a patient with pemphigus vulgaris who required combined coronary artery bypass grafting and mitral valve repair. The challenges that we faced and modifications to the technique required in this situation are described and reviewed.

Options for left internal mammary harvest in minimal access coronary surgery.

The left internal mammary artery (LIMA) to the left anterior descending artery bypass remains the gold standard for coronary artery bypass grafting. This review focuses on the three major options for LIMA takedown when using minimal access options to achieve this bypass, namely standard minimally invasive direct coronary artery bypass (MIDCAB), thoracoscopic MIDCAB, and robotically assisted MIDCAB.

Early and mid-term results of off-pump endarterectomy of the left anterior descending artery.

OBJECTIVES: Many patients referred for coronary artery bypass surgery (CABG) today have diffusely diseased coronary vessels, and some of them may require coronary endarterectomy to provide adequate revascularization. Most reports of coronary endarterectomy describe an on-pump procedure. As off-pump coronary artery bypass graft has become safer and more routine, there is renewed interest in off-pump coronary endarterectomy. We report on our series of patients who underwent off-pump coronary endarterectomy of the left anterior descending (LAD) artery using an open endarterectomy technique. METHODS: All patients undergoing open heart surgery at The Mount Sinai Medical Center are entered into a state-mandated, audited database. A retrospective review of this database revealed 12 patients between January 2008 and June 2012 who underwent off-pump endarterectomy of the LAD as part of their coronary revascularization. Additional data were collected from a review of the patients' charts. RESULTS: There were a total of 12 patients, with a mean age of 72 ± 4 years. Nine (75%) were male and 3 (25%) were female. Comorbidities included hypertension in 11 (92%) patients, dyslipidaemia in 10 (83%), diabetes in 8 (67%), renal failure in 6 (50%) and stroke in 1 (8%). The mean number of diseased coronary territories was 3 ± 0.4 (range 2-3), and the mean number of coronary bypass grafts performed was 4 ± 0.8 (range 2-5). Eight patients required transfusion with packed red blood cells (67%). One (8%) patient was converted from off-pump to on-pump. The mean intensive care unit stay was 3 ± 2.8 (range 1-8 days), and the mean hospital length of stay was 15 ± 13 (range 4-54 days). Postoperative follow-up (mean 24 ± 19 months, range 1-53) is complete, and no ischaemic events have occurred in the early and mid-term follow-up period. CONCLUSIONS: We conclude that off-pump endarterectomy of the LAD is a viable option for patients with diffuse LAD disease.

Anomalous right coronary artery from the left sinus: a minimally invasive approach.

OBJECTIVE: Anomalous right coronary artery arising from the left sinus (ARCA) is a known cause of sudden cardiac death, particularly in young athletes. Surgery is recommended for all adult patients who are symptomatic or who have evidence of exercise-induced myocardial ischemia. Surgical options include coronary artery bypass grafting (CABG) and anatomic correction by unroofing the ostium or by reimplanting the ostium into the right sinus of Valsalva. We describe the rationale and technique of a minimally invasive right thoracotomy approach for correction of ARCA. METHODS: We reviewed all patients with coronary artery disease operated upon at Mount Sinai Medical Center. Between March 2008 and September 2010, 17 patients underwent surgery for anomalous coronary origin from the opposite sinus of Valsalva. Nine of these patients had ARCA. We describe four adult patients with ARCA who were operated upon using a small right anterior thoracotomy incision to perform a right internal mammary artery (RIMA) to right coronary artery (RCA) bypass with ligation of the proximal RCA. This was performed under direct vision and without cardiopulmonary bypass. RESULTS: There were two male and two female patients. Mean age was 55.3 ± 4.8 years (range 50-61 years). Three of the patients manifested chest pain and one each syncope, dyspnea, and palpitations. Two patients had preoperative stress testing that was positive for ischemia. Postoperative follow-up (mean 14 months and range 5-37 months) is complete. All patients are alive and asymptomatic. CONCLUSIONS: ARCA can be managed with good early and midterm results using a minimally invasive right thoracotomy approach.

Minimally invasive direct coronary artery bypass: technical considerations.

Minimally invasive direct coronary artery bypass grafting (MIDCAB) uses a small anterior left thoracotomy incision and harvesting of the left internal mammary artery with an anastomosis performed to the left anterior descending artery without cardiopulmonary bypass. There is renewed interest in minimally invasive coronary surgery and hybrid revascularization. This article describes a standardized approach that has been consistently successful in our institution.

Surgical considerations in off-pump coronary artery bypass grafting.

Off pump coronary artery bypass grafting remains an important technique particularly in the care of high-risk patients. Consistently successful adoption of this technique requires a cooperative team approach and standardization across all phases of patient care. This review describes our approach to off pump coronary surgery.