The clinical benefits of using the left internal mammary artery (LIMA) to bypass the left anterior descending artery are well established making it the most frequently used conduit for coronary artery bypass surgery (CABG). Coronary subclavian steal syndrome (CSSS) occurs during left arm exertion when (1) the LIMA is used during bypass surgery and (2) there is a high grade (≥75%) left subclavian artery stenosis or occlusion proximal to the ostia of the LIMA resulting in "stealing" of the myocardial blood supply via retrograde flow up the LIMA graft to maintain left upper extremity perfusion. Although CSSS was once thought to be a rare phenomenon, its prevalence has been underestimated and is becoming increasingly recognized as a serious threat to the success of CABG. Current guidelines are lacking on recommendations for screening of subclavian artery stenosis (SAS) pre- and post-CABG. We hope to provide an algorithm for SAS screening to prevent CSSS in internal mammary artery bypass recipients and review treatment options in the percutaneous era.
Critical limb ischemia (CLI), defined as ischemic rest pain or nonhealing ulceration due to arterial insufficiency, represents the most severe and limb-threatening manifestation of peripheral artery disease. A major challenge in the optimal treatment of CLI is that multiple specialties participate in the care of this complex patient population. As a result, the care of patients with CLI is often fragmented, and multidisciplinary societal guidelines have not focused specifically on the care of patients with CLI. Furthermore, multidisciplinary care has the potential to improve patient outcomes, as no single medical specialty addresses all the facets of care necessary to reduce cardiovascular and limb-related morbidity in this complex patient population. This review identifies current gaps in the multidisciplinary care of patients with CLI, with a goal toward increasing disease recognition and timely referral, defining important components of CLI treatment teams, establishing options for revascularization strategies, and identifying best practices for wound care post-revascularization.
There is limited data to support endovascular treatment of isolated CFA atherosclerosis. CFE has durable results, but there is significant morbidity and mortality resulting from this procedure. Endovascular interventions have low rates of complications, high rates of technical success, good short-term patency but increased need for repeat interventions when compared to surgery. Further trial data comparing CFE with endovascular therapy is needed to guide the management of CFA stenosis.
Background: Studies suggest HIV infected (HIV+) people have similar rates of major adverse cardiovascular events (MACE) after AMI and/or after percutaneous coronary interventions (PCI) compared to uninfected (HIV-) people. However, these studies were limited by a lack of CD4 cell count and/or stent type data. Low CD4 cell count and bare metal stents (BMS) are associated with higher MACE rates than high CD4 cell count and drug eluding stents (DES), respectively. Our study compared the rates and risk of MACE and mortality after PCI between HIV+ and HIV- stratified by stent type and CD4 cell count. Methods: We included 611 HIV+ and 1,564 HIV- from the Veterans Aging Cohort Study Virtual Cohort, a prospective, longitudinal, observational study of HIV+ and 1:2 matched HIV- who underwent PCI with stent placement between 1/2002-1/2010. 1-year incidence rates (IR) per 1000 person years and 95% confidence intervals (CI) for MACE and mortality were calculated by HIV and CD4 (<200/≥200 cells/mm3) status and stent type (BMS vs. DES). To compare 1-year MACE and mortality between HIV+ with CD4 <200 and ≥200 to HIV-, hazard ratios (HR) were generated from multivariate Cox proportional hazards models adjusted for age, gender, race/ethnicity, hypertension, diabetes, dyslipidemia, smoking, hepatitis C, renal disease, anemia, and substance use. MACE was defined as a composite of repeat PCI, CABG, AMI using ICD9 and ICD10 codes and all-cause mortality. Results: There were 594 MACE including 108 deaths after PCI. Percent receiving DES was similar by HIV status (57% in HIV+ vs. 56% in HIV-). MACE rates were higher among those who received BMS (429.0, 95% CI 383.8-479.5) compared to DES (318.7, 95% CI 285.5-355.9), p=0.004 and the pattern is similar by HIV status. MACE rates were similar between HIV+ with CD4≥200 and HIV- (p=0.8), but higher for HIV+ with CD4<200 (p<0.001 compared to both HIV+ with CD4≥200 and HIV-). Mortality was also similar between HIV+ with CD4≥200 and HIV- (p=0.2), but higher for HIV+ with CD4<200 (p<0.01 compared to both HIV+ with CD4≥200 and HIV-). Adjusted HRs are shown in the table. Conclusion: Stent type received did not vary by HIV status. HIV+ with CD4<200 have worse outcomes post PCI with stent placement than both HIV- and HIV+ with CD4≥200. Management of HIV may be important for decreasing MACE and mortality after PCI.
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