Clinical features and outcomes in patients with cardiogenic shock complicating acute myocardial infarction: early vs recent experience with impella.

Objectives: To compare clinical features and outcomes in patients with acute myocardial infarction complicated by cardiogenic shock (AMICS) treated in the early experience with Impella percutaneous ventricular assist device and patients treated recently.

Background: Since pre-market approval (PMA) of Impella device as treatment for AMICS, use of the device has grown considerably.

Methods: We retrospectively analyzed 649 AMICS patients treated with perioperative Impella, with 291 patients treated from 2008 to 2014 comprising the early experience cohort and 358 patients treated from 2017 to 2019 comprising the recent experience cohort.

Impella support and acute kidney injury during high-risk percutaneous coronary intervention: The Global cVAD Renal Protection Study.

Background: Protection against acute kidney injury (AKI) has been reported with the use of Impella during high-risk percutaneous coronary intervention (HR-PCI). We sought to evaluate this finding by determining the occurrence of AKI during Impella-supported HR-PCI in patients from the Global cVAD Study and compare this incidence with their calculated AKI risk at baseline.

Methods And Results: In this prospective, multicenter study, we enrolled 314 consecutive patients.

Transgenic expression of a dominant negative K(ATP) channel subunit in the mouse endothelium: effects on coronary flow and endothelin-1 secretion.

K(ATP) channels are involved in regulating coronary function, but the contribution of endothelial K(ATP) channels remains largely uncharacterized. We generated a transgenic mouse model to specifically target endothelial K(ATP) channels by expressing a dominant negative Kir6.1 subunit only in the endothelium.

Endurance training-induced changes in the insulin response to oral glucose are associated with the peroxisome proliferator-activated receptor-gamma2 Pro12Ala genotype in men but not in women.

The present study sought to investigate, in sedentary men and women, (a) whether a common functional gene variant (peroxisome proliferator-activated receptor-gamma2 [PPARgamma2] Pro12Ala) predicts insulin action and (b) whether improvements in insulin action in response to endurance exercise training are associated with PPARgamma2 Pro12Ala. Sedentary, 50- to 75-year-old men and women (N = 73) were genotyped and underwent oral glucose tolerance tests (OGTTs) before and after 6 months of endurance training. At baseline, men heterozygous for the Pro12Ala variant had a greater OGTT insulin area under the curve (AUC) as compared with Pro12 homozygous men (P = .

K ATP channels of primary human coronary artery endothelial cells consist of a heteromultimeric complex of Kir6.1, Kir6.2, and SUR2B subunits.

Functional ATP-sensitive potassium (K(ATP)) channels can be reconstituted by expression of various combinations of different pore-forming subunits (Kir6.1 and Kir6.2) and sulfonylurea receptor (SUR) subunits.

Selected genetic polymorphisms and plasma coagulation factor VII changes with exercise training.

We assessed the effects of coagulation factor VII (FVII) gene polymorphisms, lipid-related polymorphisms, and exercise training-induced plasma lipoprotein lipid changes on FVII level changes with exercise training in middle- to older-aged men and women. Forty-six healthy sedentary men and women were stabilized on a low-fat diet and then underwent baseline testing, 6 mo of endurance exercise training, and final testing. Plasma FVII-Ag levels decreased with exercise training (106.