Left Atrial Appendage Closure: What Do We Know?

Atrial fibrillation (AF) is the most common arrhythmia in the United States and the most common cause of embolic cerebrovascular events, with the majority of these thrombi originating in the left atrial appendage. The left atrial appendage (LAA) has separate developmental, ultrastructural, and physiological characteristics from the left atrium. Although LAA anatomy is highly variable, it can be categorized into 4 types: cactus, cauliflower, chicken wing, and windsock. The cauliflower type is associated with higher stroke risk in patients with nonvalvular AF. Although the cornerstone of therapy to prevent embolic strokes from AF has been anticoagulation with thrombin inhibitors, a large group of patients are unable to tolerate anticoagulation due to bleeding. This has led to the development and advancement of multiple surgical and percutaneous LAA closure devices to prevent embolic cerebrovascular accidents without the need for anticoagulation. In this article, we discuss the outcomes of major studies that utilized surgical LAA occlusion and its effectiveness. Furthermore, we summarize nonsurgical methods of LAA closure and future directions regarding LAA closure.

Impact of achieving euthyroidism on pulmonary artery systolic pressures in hyperthyroidism-associated pulmonary hypertension - a systematic review.

In this systematic review, we seek to clarify the impact of treatment of hyperthyroidism on pulmonary hypertension in patients with both these conditions. We included 39 of 709 articles retrieved, that studied patients with hyperthyroidism and pulmonary hypertension (PH). From these, those with a documented pre-treatment Pulmonary Artery Systolic Pressure (PASP) > 35 mmHg and complete follow up were analyzed, yielding 3 case series and 22 case reports with a total of 81 cases. A significant improvement in PASP was noted with achieving euthyroidism in the 3 case series. The case reports showed a significant reduction in mean PASP from 60.5 ± 13.2 mmHg to 37.5 ± 10.1 mmHg (p < 0.001) in patients with Grave's disease with achieving euthyroidism. No deaths were reported during the follow up period. Achievement of a euthyroid state in patients with hyperthyroidism is associated with statistically significant reductions in PASP.

Robotic Percutaneous Coronary Intervention During COVID-19 Pandemic: Outcomes and Cost Effectiveness With Procedural Distancing.

BACKGROUND: The COVID-19 pandemic raised many questions, including the need to maintain distancing and the importance of full personal protection equipment (PPE) for healthcare workers. Robotic-assisted percutaneous coronary intervention (R-PCI) can be advantageous during a pandemic to facilitate procedural distancing for cath lab personnel and to decrease the cumulative amount of PPE employed. METHODS: All patients who underwent R-PCI during the early phase of the pandemic were evaluated at a single institution. Procedural characteristics, complexity of disease, and use of adjunctive imaging or physiology were queried. Mean R-PCI time, procedure and fluoroscopy times, radiation dose, and contrast volume were collected. Cost of PPE incurred with R-PCI was evaluated in comparison with traditional cases. Furthermore, procedural distancing from patients for operators was objectively quantified to compare with traditional cath lab cases. RESULTS: Thirteen patients were treated using R-PCI. Radial access site was utilized in 54% and the left circumflex artery was treated most frequently (in 50% of cases). The complexity of cases performed was illustrated by revascularization of chronic total occlusions in 2 patients (14%) as well as adjunctive intravascular ultrasound or instantaneous wave-free ratio in 4 patients (29%). Mean R-PCI time was 45.38 minutes, manual time was 25.66 minutes, and total procedure time was 71.08 minutes. Average fluoroscopy time was 18.27 minutes, contrast volume was 143.85 mL, and radiation dose was 747.15 mGy. R-PCI was more cost effective, with total average PPE cost of $330.71 in comparison with $496.08 for traditional PCI (absolute difference, $165.36). Furthermore, R-PCI demonstrated substantial procedural distancing of operators from patients (8.14 feet for R-PCI vs 2.75 feet for traditional PCI; absolute difference, 5.39 feet). CONCLUSION: R-PCI could be a promising strategy during a pandemic by facilitating procedural distancing, minimizing staffing exposure risk, and decreasing PPE cost.

Impact of COVID-19 on Heart Failure Hospitalizations.

The Novel Coronavirus Disease 2019 (COVID-19) pandemic has transformed individual lives and societal framework on a global scale, and in no other sector is this more evident than healthcare. Herein, we aim to describe the impact of the current COVID-19 pandemic and its associated restrictions on heart failure (HF) admissions. In this retrospective cohort study, we obtained administrative data for patients with a primary discharge diagnosis of HF (identified by ICD-10 code) with discharge dates ranging from January 2019 to November 2020. The study is comprised of 2 distinct sub-cohorts: HF admissions during the COVID-19 pandemic (case) period from March 2020 to October 2020 and corresponding control period during the previous year (March 2019 to December 2019). Primary outcome analysis involved comparison of total and daily HF admissions and secondary outcomes included hospital Length of Stay (LOS) and 30-day readmissions. The number of total HF admissions and average daily admissions were significantly lower in 2020 compared to 2019 (774 vs. 864; p < 0.001 and 3.17 vs. 3.53 days; p < 0.001), respectively. Average length of stay was significantly higher between March and October 2020 relative to the same months in 2019 (6.05 vs. 5.25 days; p < 0.001). Thirty-day readmission rates were also significantly higher in March-October 2020 compared to the same months in 2019 (20.6% vs. 19.1%; p < 0.001). During the pandemic, both readmission rates and length of stay for HF-related admissions were significantly impacted. The COVID-19 pandemic significantly impacted HF-related admissions as well as associated LOS and 30-day readmissions. High-risk patients should be identified carefully, and timely and appropriate treatment should be provided.