Atrial mechanical contraction and ambulatory atrioventricular synchrony: Predictors from the OPTIVALL study.

Introduction: The role that preprocedural factors have on atrioventricular synchrony (AVS) provided by leadless pacemakers requires investigation.

Methods And Results: We aimed to assess the correlation between mitral inflow echocardiographic parameters and p-wave morphology with the accelerometer A4 signal amplitude. We also sought to identify clinical and echocardiographic predictors of optimal ambulatory AVS (≥85% of cardiac cycles).

Optimizing atrial sensing parameters in leadless pacemakers: Atrioventricular synchrony achievement in the real world.

Background: Performance of the leadless pacemaker capable of atrioventricular (AV) synchronous pacing in de novo patients warrants further investigation.

Objective: The aims of this study were to assess what programming changes are needed to achieve proper atrial tracking and to study the percentage of AV synchrony (AVS) the device can provide under real-world conditions.

Methods: Consecutive patients undergoing Micra AV implantation between June 2020 and November 2021 were studied.

SARS-CoV-2 infection: A predisposing factor for acute coronary syndrome.

Introduction: Several case series of ACS have been reported in COVID 19 patients. We aim to study its incidence, characteristics, and three-month prognosis. To put this incidence in perspective we compared it with the incidence of in-hospital ACS during the same period of 2019.

SARS-CoV-2 infection: A predisposing factor for acute coronary syndrome.

Introduction: Several case series of ACS have been reported in COVID 19 patients. We aim to study its incidence, characteristics, and three-month prognosis. To put this incidence in perspective we compared it with the incidence of in-hospital ACS during the same period of 2019.

Systemic thrombosis in a large cohort of COVID-19 patients despite thromboprophylaxis: A retrospective study.

Background: Incidence of thrombotic events associated to Coronavirus disease-2019 (COVID-19) is difficult to assess and reported rates differ significantly. Optimal thromboprophylaxis is unclear.

Objectives: We aimed to analyze the characteristics of patients with a confirmed thrombotic complication including inflammatory and hemostatic parameters, compare patients affected by arterial vs venous events and examine differences between survivors and non-survivors.