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Recurrent orthostatic syncope due to left atrial and left ventricular collapse after a continuous-flow left ventricular assist device implantation

The Challenges of Venoarterial ECMO for Postcardiotomy Shock

Rescuing the right ventricle: A conceptual framework to target new interventions for patients receiving a durable left ventricular assist device

Fellowship Training in Adult Cardiothoracic Anesthesiology: Navigating the New Educational Landscape as a Result of the Coronavirus Crisis

Minimally Invasive Esophagectomy In the Modern Era: Is Regional Anesthesia Still the Answer?

Underutilization of Paravertebral Block in Thoracic Surgery

The Emerging Role of Bivalirudin for Therapeutic Anticoagulation in Patients With Coronavirus Disease 2019 Requiring Extracorporeal Membrane Oxygenation Support: Is It Time to Change the Routine Practice?

Cardiac Surgery-Enhanced Recovery Programs Modified for COVID-19: Key Steps to Preserve Resources, Manage Caseload Backlog, and Improve Patient Outcomes

TEG R-Time Guided Plasma Transfusion: R We There Yet?

Cost-effectiveness analysis in cardiac surgery: A review of its concepts and methodologies

Preoperative considerations of new long-acting glucagon-like peptide-1 receptor agonists in diabetes mellitus

We have reconstituted human mitochondrial transcription in vitro on DNA oligonucleotide templates representing the light strand and heavy strand-1 promoters using protein components (RNA polymerase and transcription factors A and B2) isolated from Escherichia coli. We show that 1 eq of each transcription factor and polymerase relative to the promoter is required to assemble a functional initiation complex. The light strand promoter is at least 2-fold more efficient than the heavy strand-1 promoter, but this difference cannot be explained solely by the differences in the interaction of the transcription machinery with the different promoters. In both cases, the rate-limiting step for production of the first phosphodiester bond is open complex formation. Open complex formation requires both transcription factors; however, steps immediately thereafter only require transcription factor B2. The concentration of nucleotide required for production of the first dinucleotide product is substantially higher than that required for subsequent cycles of nucleotide addition. In vitro, promoter-specific differences in post-initiation control of transcription exist, as well as a second rate-limiting step that controls conversion of the transcription initiation complex into a transcription elongation complex. Rate-limiting steps of the biochemical pathways are often those that are targeted for regulation. Like the more complex multisubunit transcription systems, multiple steps may exist for control of transcription in human mitochondria. The tools and mechanistic framework presented here will facilitate not only the discovery of mechanisms regulating human mitochondrial transcription but also interrogation of the structure, function, and mechanism of the complexes that are regulated during human mitochondrial transcription.

Electrocardiographic features of patients with COVID-19: One year of unexpected manifestations

Use of CoSeal in a Patient With a Left Ventricular Assist Device

Pulmonary Hypertension: From an Orphan Disease to a Public Health Problem