Current Problems in Cardiology最新文献

Cardiovascular diseases (CVDs) are leading causes of mortality throughout the world, and hence, there is a critical need to elucidate their molecular mechanisms. The Sirtuin (SIRT) family of NAD+-dependent enzymes has recently been shown to play a critical role in cardiovascular health and disease, and several SIRT isoforms, especially SIRT1 and SIRT3, have been amply investigated. However, the precise function of SIRT2 is only partially explored. Here, we review the current understanding of the involvement of SIRT2 in various cardiovascular pathologies, such as cardiac hypertrophy, ischemia-reperfusion injury, diabetic cardiomyopathy, and vascular dysfunction, with emphasis placed on the context-dependent protective or deleterious actions of SIRT2, including its wide array of catalytic activities which span beyond deacetylation. Furthermore, the review uncovers several unresolved research gaps for SIRT2 mechanisms by which SIRT2 modulates cardiac and vascular function during development and aging, thereby paving the way for the discovery of novel therapeutic targets as well as SIRT2-targeted interventions in the prevention and treatment of various cardiovascular diseases.

Background: Atrial septal defects (ASD) often go unrecognized until very late in life. The impact of ASD closure on life expectancy in elderly patients remains unclear. This study compares the survival of patients≥65-years who underwent ASD closure with their average life expectancy (ALE).

Methods: Single-centre retrospective study including all patients ≥65-years who underwent ostium secundum (OS) ASD closure (surgical/percutaneous) between 1998-2020. Baseline characteristics and the predicted peri-procedural ALE (as determined per pre-defined national ALE tables) for every given patient were assessed.

Results: 706 patients underwent OS ASD closure, 37 (5%) had ≥65 years-mean age 69±5 years, 62% presented with heart failure. Mean ASD size=21±9mm, 22% patients had severe tricuspid regurgitation, mean systolic pulmonary artery pressure (SPAP)=50±11mmHg. Five patients were treated surgically. At a mean follow-up of 9±5 years, mortality rate was 46%, occurring 8.8±5.3 years after the procedure. 25 (68%) outlived their predicted ALE. Overall, the mean age of death did not differ from the predicted ALE (79±6 vs. 84±1 years, p=0.304), however there was a 10-year absolute difference between patients who died prematurely vs. those who surpassed ALE (77±4 vs. 87±3 years, p<0.001). Patients who failed to reach ALE had higher SPAP (58±10 vs. 46±8mmHg, p=0.001) and a higher incidence of severe tricuspid regurgitation (42 vs. 12%, p=0.040).

Conclusion: Survival after late ASD closure was comparable to the expected ALE, though one-third of the patients died prematurely. Higher SPAP and severe tricuspid regurgitation were associated with premature death. ASD closure in elderly requires a thorough evaluation to ensure maximum benefit.

Background: The relationship between high sodium intake (HSI) and hypertensive heart disease (HHD) has been confirmed. However, notable regional disparities exist in implementing effective measures to control sodium intake. This study was carried out to estimate the spatiotemporal trends in the burden of HHD attributable to HSI.

Methods: Data obtained from the Global Burden of Disease Study 2021 were analyzed, considering factors such as age, gender, year, and region. Joinpoint regression analysis was applied to investigate the temporal trends in the HHD burden resulting from HSI over the past 32 years.

Results: From 1990 to 2021, the global cases of HHD increased significantly annually. The age-standardized prevalence rates showed a slow gradual increase. However, both the age-standardized death and disability-adjusted life-year (DALY) rates decreased. Specifically, HSI was responsible for 29.2% of total HHD deaths and 30.4% of total DALYs in 1990 but only 22.8% of total HHD deaths and 23.4% of total DALYs in 2021. A greater burden from HSI exposure was observed among men, older adults and people living in middle and low sociodemographic index (SDI) countries and regions. Moreover, over the 32-year period, Guam and Colombia demonstrated the highest reduction in age-standardized death and DALY rates, respectively.

Conclusion: Globally, the age-standardized burden of HHD due to HSI has demonstrated a decline. Although some areas have effectively managed this issue, it remains a challenge in specific areas. Hence, it is crucial to examine and implement the strategies adopted by successful nations to further mitigate this burden.

Introduction: The survival rates of breast cancer patients have improved drastically in the past few decades due to advancements in anti-neoplastic drugs. Trastuzumab (TZ) chemotherapy is associated with left ventricular dysfunction leading to cardiotoxicity. Two-dimensional speckle-tracking echocardiography has demonstrated efficacy in predicting TZ-induced cardiotoxicity; however, its role in using right ventricular (RV) strain parameters remains unclear.

Methods: A comprehensive literature search spanning major electronic databases was conducted to identify studies comparing pre- and post-TZ chemotherapy RV strain parameters. The outcomes of interest included RV global longitudinal strain (GLS) and RV free-wall longitudinal strain (FWLS). Mean differences (MD) with 95% confidence intervals (CI) were pooled using the inverse-variance random-effects model. Statistical significance was set at p<0.05.

Results: Four studies involving 275 cancer patients were included. The mean age of the patients was 53.35 ± 11.1 years. The pooled analysis demonstrated significantly reduced RV GLS [MD: -1.94; 95% CI: -2.83, -1.05; p<0.01] and RV FWLS [MD: -2.05; 95% CI: -3.61, -0.50; p<0.01] on follow-up post-TZ chemotherapy compared to pre-TZ baseline values.

Conclusion: Following TZ-based chemotherapy, RV subclinical damage ensues without overt clinical signs, leading to the deformation of RV mechanics. This meta-analysis demonstrated a reduction in RV GLS and RV FWLS after TZ-based chemotherapy.

Background: Spontaneous coronary artery dissection (SCAD) has been increasingly recognized in the past decades. SCAD patients can present with acute myocardial infarction (AMI), particularly in young healthy women without conventional risk factors. However, data on the outcomes of SCAD patients presenting with AMI or benefit of PCI for SCAD in the setting of AMI is inconclusive.

Methods: We evaluated the prevalence, recent trends, the incidence and in-hospital mortality among women with acute myocardial infarction (AMI) who presented with or without SCAD, and to evaluate the impact of PCI on in-hospital mortality from a population-based analysis, using the National Inpatient Sample (NIS) database between 2016 and 2019.

Results: From 2016-2019, there were 1,527,555 cases of females presenting with AMI. Of that number, there were 12,125 cases of SCAD. Mortality trends in the SCAD and non-SCAD group were comparable. There was a gradual increase in incidence each year for SCAD-STEMI.

Conclusion: Mortality did not differ from 2016-2019 in patients with MI found to have SCAD or not. However, it seems that the SCAD-MI cases are gradually increasing each year. More research needs to be performed to better elucidate treatment outcomes in these patients.