Ahmed, Raheel

Heart failure with reduced ejection fraction is a major cause of morbidity and mortality. Cardiac resynchronization therapy (CRT) improves outcomes but faces challenges such as unsuccessful lead placement and suboptimal responses. The Wireless Stimulation Endocardially for CRT (WiSE-CRT) system, a novel leadless left ventricular (LV) pacing technology, uses ultrasonic energy to deliver electrical stimulation directly to the LV endocardium, potentially improving the response rates. A comprehensive literature search was performed across multiple databases from inception until August 2024. The outcomes of interest included the New York Heart Association (NYHA) functional score, LV ejection fraction (LVEF), LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV), and QRS duration. Statistical analysis involved pooling the mean differences (MDs) and their corresponding 95% confidence intervals (CIs) from each study using the inverse-variance random-effects model in RevMan version 5.4.1 software. Seven studies, including 468 patients with heart failure treated with the WiSE-CRT system, were included. The pooled analysis showed significant improvements in NYHA functional score (MD: −0.44; 95% CI: −0.67 to −0.21; P = 0.0002; I 2 = 77%), LVEF (MD: 5.71; 95% CI: 4.54 to 6.87; P < 0.001), LVEDV (MD: −24.49; 95% CI: −33.24 to −15.73; P < 0.001), and LVESV (MD: −24.47; 95% CI: −32.80 to −16.14; P < 0.001). The QRS duration also decreased significantly (MD: −38.62; 95% CI: −46.76 to −30.49; P < 0.001; I 2 = 60%). The WiSE-CRT system significantly improved NYHA functional score, LVEF, QRS duration, LVEDV, and LVESV in patients with heart failure. This leadless pacing technology offers a promising alternative for ineligible candidates or for those who do not respond to conventional CRT.

Cardiovascular disease (CVD) is the leading cause of mortality and morbidity worldwide. Low-dose colchicine is a novel and nonstandard management approach for patients with CVDs who are at an increased risk of adverse events. However, few studies have reported the risk of stroke with colchicine, with controversial results. This meta-analysis aimed to compare the efficacy of colchicine and placebo for stroke prevention in patients with CVD. Major electronic databases were screened for randomized controlled trials (RCTs) comparing colchicine and placebo in patients with CVDs from inception to June 2024. Pooled estimates were calculated as risk ratios (RRs) with 95% confidence intervals (CIs) using an inverse-variance random-effects model. Statistical significance was set at P < 0.05. A total of 15 RCTs encompassing 25,116 patients with CVDs were included (12,568: colchicine and 12,548: placebo). The pooled analysis demonstrated a significant reduction in stroke [RR, 0.80 (95% CI, 0.64–0.99); P = 0.04] with colchicine compared with placebo. The risk of all-cause mortality [RR, 1.00 (95% CI, 0.77–1.28)] was comparable between the 2 groups. On subgroup analysis, low-dose colchicine (0.5 mg/day) demonstrated a significantly lower risk of stroke compared with high-dose (>0.5 mg/day) colchicine, which failed to achieve statistical significance. Based on this meta-analysis, colchicine significantly reduced stroke in patients with CVDs compared with placebo. This effect was most significant with low-dose colchicine at 0.5 mg/day. However, no differences were observed in all-cause mortality. Further long-term RCTs are warranted to investigate stroke prevention using colchicine in this population.

Background: Sarcoidosis is a multisystem disorder characterized by non-caseating granulomas in various organs. While cardiac sarcoidosis (CS) is clinically rare, it has significant implications, including heart failure, ventricular arrhythmias, and sudden cardiac death. Speckle-tracking echocardiography has emerged as a promising tool for detecting subclinical myocardial dysfunction, which is cost-efficient and readily available. This meta-analysis aims to evaluate differences in functional echocardiographic parameters between patients with CS and extracardiac sarcoidosis (ECS) to improve early recognition and management. Methods: A comprehensive search of major bibliographic databases was conducted to identify studies up to December 2024. Mean differences (MDs) with 95% CIs were pooled using the inverse-variance random-effect model. Results: Seven studies with 478 patients with sarcoidosis (CS: 159 and ECS: 319) were included. Patients with CS had a significant reduction in left ventricular global longitudinal strain (MD: −2.73; 95% CI: −4.09, −1.38; p < 0.0001) and tricuspid annular plane systolic excursion (MD: −0.59; 95% CI: −1.12, −0.05; p = 0.03) compared to patients with ECS. No significant differences in the LV global circumferential strain, interventricular septum thickness, left ventricular ejection fraction, E/A ratio, E/E’ ratio, LV end-diastolic diameter, and LV end-systolic diameter were noted. Conclusions: LV GLS and TAPSE are promising parameters for the early detection of cardiac involvement in sarcoidosis, with significant prognostic implications. Although STE provides a cost-effective and accessible alternative to CMR and FDG-PET, further research is needed to standardize its use and validate diagnostic cut-offs.

Background: Heart transplantation (HTx) is a life-saving procedure for patients with end-stage heart disease. Sarcoid myocarditis (SM) is a rare condition characterized by granulomatous inflammation of the myocardium. The mainstay of therapy is immunosuppression but the incidence of cardiac sarcoidosis leading to advanced heart failure is increasing. HTx is a valid option in such cases however post-HTx outcomes in sarcoid population have been poorly investigated. Methods: A retrospective analysis of the National Inpatient Sample (NIS) from 2016 to 2021 was conducted. Outcomes compared between sarcoid and non-sarcoid HTx groups were mortality, length of stay (LOS), hospital charges, transplant rejection and graft failure. Mann-Whitney U test was utilized to compare differences between non-parametric variables, while multivariable logistic regression was applied to adjust for confounders. Results: During our study period a total of 17,635 patients underwent HTx out of which 235 (0.013%) had HTx due to sarcoid myocarditis. Multivariable analysis revealed a comparable mortality between sarcoid and non-sarcoid HTx (Adjusted Mortality: aOR 1.35; CI 0.40-4.56; p=0.61). Median length of stay in sarcoid myocarditis group was 29[IQR19-55] vs 28[IQR16-50] p=0.57. Total hospitalization charges were also comparable 956,893[IQR 649,498-1,451,199] vs 800,898[IQR 533,047-1,349,074], p=0.18. There was no significant increase in transplant rejection (aOR 1.43; CI 0.64-3.20; p=0.37) or graft failure (aOR 1.92; CI 0.55- 6.70; p=0.30) in the sarcoid myocarditis group (Table 1, Table 2). Conclusion: Sarcoid myocarditis patients undergoing HTx showed comparable mortality, LOS, total hospital charges, transplant rejection, or graft failure rates to patients undergoing HTx for other causes.While these findings suggest that SM, while rare, does not adversely affect transplant outcomes, we strongly advocate for more studies to adjust for limitations.

AbstractBackgroundCardiac tamponade or pericardial tamponade (PT) can be a complication following invasive cardiac procedures.MethodsPatients who underwent various procedures in the cardiac catheterization lab (viz. coronary interventions) were identified using the International Classification of Diseases, Ninth and Tenth Edition, Clinical Modification (International classification of diseases [ICD]‐9‐Clinical modification [CM] and ICD‐10‐CM, respectively) from the Nationwide Inpatient Sample (NIS) database. Patient demographics, presence of comorbidities, PT‐related events, and in‐hospital death were also abstracted from the NIS database.ResultsThe frequency of PT‐related events in the patients undergoing CI from 2010 to 2017 ranged from 3.3% to 8.4%. Combined in‐hospital mortality/morbidity of PT‐related events were higher with increasing age (odds ratio [OR] [95% CI]: chronic total occlusion (CTO) = 1.19 [1.10‐1.29]; acute coronary syndrome (ACS) = 1.21 [1.11‐1.33], both p < 0.0001) and female sex (OR [95%CI]: CTO = 1.70 [1.45‐2.00]; ACS = 1.72 [1.44‐2.06], both p < 0.0001). In‐hospital mortality related to PT‐related events was found to be 8.5% for coronary procedures. In‐hospital mortality was highest amongst the patients undergoing percutaneous transluminal coronary angioplasty (PTCA) for ACS (ACS vs. non‐CTO PTCA vs. CTO PTCA: 15.7% vs. 10.4% and 14.4%, p < 0.0001 and ACS vs. non‐CTO PTCA vs. CTO PTCA: 12.1% vs. 8.1% and 5.6%, p = 0.0001, respectively).ConclusionsIn the real‐world setting, PT‐related events in CI were found to be 3.3%−8.4%, with in‐hospital mortality of 8.5%. The patients undergoing PTCA for ACS were found to have highest mortality. Older patients undergoing CTO PTCA independently predicted higher mortality.