Journal of Cardiovascular and Thoracic Research
Year:2020 | Volume:12 | Issue:4|Papers Count:15

This meta-analysis was performed to assess the effect of L-carnitine supplementation on lipid profile. A systematic search were conducted in PubMed and Scopus to identify randomized clinical trials (RCTs) which evaluated the effects of L-carnitine on lipid profile. Pooled effect sizes were measured using random-effect model (Dersimonian-Laird). Meta-analysis showed that L-carnitine supplementation significantly reduced total cholesterol (TC) (weighted mean difference [WMD]:-8. 17 mg/dL; 95% CI,-14. 68 to-1. 65, I2=52. 2%, P = 0. 041). Baseline level of TC was a source of heterogeneity, with a greater effect in studies with a baseline level of more than 200 mg/d (WMD:-11. 93 mg/dL; 95% CI,-20. 80 to-3. 05). L-carnitine also significantly decreased low-density lipoprotein-cholesterol (LDL-C) (WMD:-5. 22 mg/dL; 95% CI,-9. 54 to-0. 91, I2=66. 7%, P = 0. 010), and LDL-C level <100 mg/dL), trial duration, and L-carnitine dosage were potential sources of heterogeneity. L-carnitine supplementation appeared to have no significant effect on high-density lipoprotein-cholesterol (HDL-C) (WMD:-0. 51 mg/dL; 95% CI,-2. 45 to 1. 44) and triglyceride (TG) (WMD: 2. 80 mg/dL; 95% CI,-8. 09 to 13. 69). This metaanalysis revealed that L-carnitine may have favorable effects on lipid profile, especially LDL-C and TC. However, further RCTs are needed to confirm the veracity of these results, particularly among hyperlipidemic patients...

Cardiovascular diseases (CVDs) are the leading cause of death globally. Because of the economic and social burden of acute myocardial infarction and its chronic consequences in surviving patients, understanding the pathophysiology of myocardial infarction injury is a major priority for cardiovascular research. MI is defined as cardiomyocytes death caused by an ischemic that resulted from the apoptosis, necrosis, necroptosis, and autophagy. The phases of normal repair following MI including inflammatory, proliferation, and maturation. Normal repair is slow and inefficient generally so that other treatments are required. Because of difficulties, outcomes, and backwashes of traditional therapies including coronary artery bypass grafting, balloon angioplasty, heart transplantation, and artificial heart operations, the novel strategy in the treatment of MI, cell therapy, was newly emerged. In cell therapy, a new population of cells has created that substitute with damaged cells. Different types of stem cell and progenitor cells have been shown to improve cardiac function through various mechanisms, including the formation of new myocytes, endothelial cells, and vascular smooth muscle cells. Bone marrow-and/or adipose tissue-derived mesenchymal stem cells, embryonic stem cells, autologous skeletal myoblasts, induced pluripotent stem cells, endothelial progenitor cells, cardiac progenitor cells and cardiac pericytes considered as a source for cell therapy. In this study, we focused on the point of view of the cell sources...

Introduction: Findings of studies on the association between evening meal and obesity are inconclusive. Thus, we sought to investigate the association between major dietary patterns at evening meal and obesity among apparently healthy adults in Tehran. Methods: This cross-sectional research was conducted using 833 adult men and women who lived in Tehran (age range: 20-59 years). Their dietary intake was evaluated by three, 24-h dietary recalls (24hDRs), and major patterns were identified using exploratory factor analysis. The association between major dietary patterns at dinner with general and central obesity was assessed using logistic regression analysis. Results: We identified 3 major dietary patterns at dinner including “ prudent” , “ potatoes and eggs” and “ Western” patterns. There was no significant relationship between prudent and general obesity (OR: 0. 76, 95% CI = 0. 21, 1. 15, P value = 0. 20), and, a significant association was not observed between potatoes and eggs and general obesity (OR: 0. 89, 95% CI = 0. 60, 1. 32, P value = 0. 57) also, there was no significant relationship between Western dietary pattern and general obesity in this study (OR: 0. 95, 95% CI = 0. 63, 1. 43, P value = 0. 82). Further analyses showed that there was no significant relationship between central obesity with any of the dietary patterns. Conclusion: The results of this study do not support a possible relationship between major dietary patterns at dinner with general and central obesity. However, the presented findings should be confirmed in prospective studies.

Introduction: The current study was sought to assess the immediate effect of percutaneous balloon mitral valvuloplasty (PBMV) on right ventricular (RV) and pulmonary functions using speckle tracking echocardiography (STE) and spirometry respectively. Methods: Two-dimensional speckle tracking and doppler studies for strain and strain rate imaging of RV were performed before PBMV, after 48h and 15 days of PBMV using echocardiography and spirometry. Mitral valve area, peak and mean mitral valve transannular pressure gradients, late filling velocities, Wilkins score, Systolic pulmonary artery pressure, TAPSE, RV end-diastolic and end-systolic areas, RV fractional area change and Tei index were measured. Results: There was a significant rise in peak RV global longitudinal strain (GLS) from baseline to 48h post PBMV and at 15 days post PBMV. Segmental RV strain at basal septum, mid septum, apical septum and basal RV free wall showed considerable improvement from baseline to 48h post PBMV and 15 days post PBMV. RV longitudinal strain rate parameters did not show significant improvement after PBMV and remained low at follow-up. Post PBMV all patients showed restrictive features on pulmonary function test. The mean FEV1 (% predicted), mean FVC (% predicted), mean PEFR improved from baseline to 48h PBMV and 15 days post PBMV. Though the mean FEV1/FVC increased post PBMV at 15 days follow-up, but it was statistically insignificant. Conclusion: RV performance in MS was decreased mainly due to increase in RV afterload which improves after PBMV. Patients with severe MS have impaired pulmonary function which is of restrictive type and successful PBMV improves pulmonary function.

Introduction: Overexposure to heat conditions can affect the functioning of the cardiovascular system and may promote cardiovascular disorders. Heat shock induced myocardial injury via increasing endoplasmic reticulum response-mediated apoptosis. This study investigated the impact of pretreatment with Rosa canina (RC), a natural antioxidant, on myocardial damage induced by heat stress exposure and underlying mechanisms in cardiomyocytes in rats. Methods: Sixty adult male Wistar rats were allocated into five groups, including Control: received normal saline (NS), Heat Stress (HS), and HS+RC groups. Animals in the HS groups were subjected to heat stress (43 º C) for 15 minutes once a day for two weeks. Animals in the HS+RC groups received three doses of RC (250, 500, and 1000 mg/mL) one hour before being subjected to heat shock. The endoplasmic reticulum (ER) transmembrane kinases, including PKR-like endoplasmic reticulum kinase (PERK), immunoreactivity of CCAAT/enhancer-binding protein homologous protein (CHOP), and eukaryotic translation initiation factor 2-alpha (eIF2α ) as well as caspase 8 were detected by Western blot. The levels of reactive oxygen species (ROS) were assessed. Moreover, histopathological changes and apoptosis were also assayed in the heart tissue by using histopathological and TUNEL assays. Results: Heat exposure increased the level of ROS and induced oxidative damage in the heart tissue. The results demonstrated that RC administration decreased the overproduction of ROS induced by heat stress in cardiomyocytes. Moreover, heat stress upregulated the expression of p-PERK, p-eIF2α , and CHOP protein while pretreatment with RC decreased expression of ER stress-related markers in cardiomyocytes. Besides, RC diminished heat stress-induced cellular damage and apoptosis associated with inhibition of caspase 8 activation, a pro-apoptotic protein in cardiomyocytes. Conclusion: These findings indicate that RC exerts a protective effect on heart tissue, at least in part, through inactivation of PERK/eIF2α /CHOP pathway or inhibition of ER stress and oxidative stresstriggered apoptosis in cardiomyocytes induced by heat stress.

Introduction: Dietary patterns are an important factors in the progress of cardiovascular disease. This study aimed to assess the association between dietary patterns and coronary artery disease (CAD). Methods: A case-control study was carried on 550 participants. Food expenditure was collected using a validated 168-item food-frequency questionnaire. Dietary patterns were extracted by principal component analysis (PCA). Multiple logistic regressions was used to assess the association between dietary patterns and the risk of CAD. Results: Three major dietary patterns were identified: the “ Quasi-Western Pattern” was characterized by higher intakes of sweets and desserts, snacks, legumes, honey or jam, ketchup, mayonnaise, yellow vegetables, potatoes, red meat, refined grains; the “ Sugar and Fast foods Pattern” was characterized by higher intakes of sugar, soft drinks, fast foods, high-fat dairy, hydrogenated fats, and the “ Quasi-Mediterranean Pattern” was characterized by higher intakes of fruits, cruciferous vegetables, green leafy vegetables, other vegetables, nuts, coffee. In both sexes, the “ Quasi-Western Pattern” and the “ Sugar and Fast foods Pattern” were positively associated with the risk of CAD. For “ Quasi-Western Pattern” , adjusted-ORs were (OR: 1. 35, 95% CI: 0. 99-1. 83, P = 0. 05) and (OR: 1. 38, 95% CI: 1. 03-1. 83, P = 0. 03) for men and women respectively. The ORs were for “ Sugar and Fast foods Pattern” (OR: 3. 64, 95% CI: 2. 25-5. 89, P < 0. 001) and (OR: 3. 91, 95% CI: 2. 42-6. 63, P < 0. 001) for men and women respectively. There was a significant inverse relationship among “ Quasi-Mediterranean pattern” and CAD in the crude model in women (OR: 0. 7, 95% CI: 0. 55-0. 89, P = 0. 0. 004). Conclusion: High adherence to the “ Quasi-Western Pattern” and “ Sugar-Fast foods Pattern” dietary patterns were associated with a higher risk of CAD. The “ Quasi-Mediterranean pattern” reduced the risk of CAD.

Introduction: Myocardial infarction (MI) is the leading cause of death all over the world. The pivotal roles of Phospholipase C like 2 gene (PLCL2) in calcium homeostasis and immune responses make this gene as a potential candidate for its role in MI pathogenesis. The present study was undertaken to investigate whether rs4618210A>G polymorphism in PLCL2 gene contribute to MI etiology. Methods: A hospital-based case-control study with 600 subjects, including 300 MI patients and 300 controls, was conducted. Genotyping of PLCL2 rs4618210 polymorphism was performed using amplification refractory mutation system-polymerase chain reaction (ARMS PCR) method. Data were analyzed using logistic regression analysis. Results: No significant association was found between the PLCL2 rs4618210 alleles and MI risk. However, a significantly increased risk of MI was observed among carriers of the AG genotype (OR = 1. 91; 95% CI = 1. 24-2. 93; P = 0. 003) compared with AA homozygote. In a dominant mode of inheritance for G allele (GG + AG vs. AA), the frequency of the carriers of at least one G allele was higher in cases compared to controls (OR= 1. 56; 95% CI: 1. 03 – 2. 36; P = 0. 037). Conclusion: Our study provided further evidence that PLCL2 gene polymorphism may serve as a prognostic marker for MI.

Introduction: Epicardial fat tissue, the true visceral adipose depot of the heart, has been associated with changes in both cardiac function and morphology. This study aimed to show the relationship between epicardial fat tissue (EFT) thickness and graft flow dynamics in arterial and venous grafts in coronary artery bypass graft surgery (CABG). Methods: Patients underwent transthoracic echocardiography before surgery and epicardial fat thickness were evaluated. The patients were divided into two groups as EFT value <5. 5 (group 1) mm and ≥ 5. 5 (group 2) mm. One hundred eighty-one patients with a total of 434 grafts (162 arterial and 272 venous) underwent isolated coronary artery bypass grafting surgery. All grafts were examined by transit time flowmeter intraoperatively. Results: The mean epicardial fat tissue thickness values were 4. 9± 0. 8 mm and 6. 1± 1. 3 mm, respectively. Mean graft flow values of left internal mammary artery was 44. 21± 23. 2 mL/min in group 1 and 39. 65 ± 19. 2 mL/min in group 2 (P = 0. 041). Similarly, mean graft flow values were higher in group 1 in all venous grafts regardless of which vessel bypass was performed. There is a significant negative correlation between epicardial fat thickness and mean graft flow. Conclusion: Epicardial fat thickness measurement preoperatively might provide additional data for the faith of the graft.

Introduction: Studies have shown that a hemodynamic-guided therapy improves the postoperative outcomes of high-risk patients. This study, evaluated if a short period through minimally invasive hemodynamic monitoring, pressure recording analytical method (PRAM), on admission to a post-cardiac surgery step-down unit (SDU), may identify patients at higher risk of 6-month adverse events after cardiac surgery. Methods: From December 2016-May 2017, 173 patients were admitted in SDU within 24-48 hours of major cardiac surgery procedure, and submitted to clinical, laboratoristic and echocardiographic evaluation and a 1-hour PRAM recording to obtain a “ biohumoral snapshot” of individual patient’ s. 156 173 patients (17 patients were lost at follow-up) were phone interviewed six months after surgery, to evaluate, as a composite end-point, the adverse events during follow-up. A multivariable logistic regression analysis was used to identify a model clinical-biohumoral (CBM) and clinical-biohumoralhemodynamics (CBHM). Results: No data from past clinical history and no conventional risk score (EuroScore II, STS score) independently predicted the risk of 6-month major events in our study. The risk of adverse events at six-month follow-up was directly related, in the CBM, to sustained post-operative cardiac arrhythmias, higher values of NT-proBNP and of arterial pH; inversely related to values of hs-C-reactive protein (hs-CRP) and, in the CBHM, to low values of cardiac cycle efficiency (CCE) and dP/dtmax. Conclusion: Our study although limited by its observational nature and by the limited number of patients enrolled, showed that a short period of minimally invasive hemodynamic monitoring increased the accuracy to identify patients at major risk of mid-term events after cardiac surgery.

Introduction: The aim of this study was to evaluate the in-hospital and short-term predictive factors of mortality in intermediate-high risk acute pulmonary embolism (PE) patients with right ventricle (RV) dysfunction and myocardial injury. Methods: In this retrospective study, the medical records of 187 patients with a diagnosis of intermediatehigh risk acute PE were evaluated. A contrast-enhanced multi-detector pulmonary angiography was used to confirm diagnosis in all cases. All-cause mortality was determined by obtaining both inhospital and 30 days follow-up data of patients from medical records. Results: During the in-hospital stay (9. 5± 4. 72 days), 7 patients died, resulting in an acute PE related in-hospital mortality of 3. 2%. Admission heart rate (HR), (Odds ratio (OR), 1. 028 95% Confidence interval (CI), 0. 002-1. 121; P = 0. 048) and blood urea nitrogen (BUN) (OR, 1. 028 95% CI, 0. 002-1. 016; P = 0. 044) were found to be independent predictors for in-hospital mortality in a multivariate logistic regression analysis. In total, 32 patients (20. 9%) died during 30 days follow-up. The presence of congestive heart failure (OR, 0. 015, 95%CI, 0. 001-0. 211; P = 0. 002) and dementia (OR, 0. 029, 95%CI, 0. 002-0. 516; P = 0. 016) as well as low albumin level (OR, 0. 049 95%CI, 0. 006-0. 383; P = 0. 049) were associated with 30 days mortality. Conclusion: HR and BUN were independent predictors of in-hospital mortality and the presence of congestive heart failure, dementia, and low albumin levels were associated with higher 30 days mortality.

Introduction: In developing countries where talc may not be readily available, video-assisted thoracoscopic (VATS) iodopovidone pleurodesis offers an excellent alternative for the treatment of malignant pleural effusions (MPEs). Methods: This study analyzes a retrospective experience using VATS iodopovidone pleurodesis for malignant pleural effusions at a single cardiothoracic center in the capital of Colombia evaluating success according to LENT (Lactate, Eastern Cooperative Oncology Group-ECOG, Neutrophil-Lymphocyte ratio, Tumor type) scores. A total of 75 records of patients taken to VATS iodopovidone pleurodesis for MPEs were retrieved from our institutional database during a 5-year period from 2014-2019. Of these, 45 had complete clinical history data necessary to analyze both LENT scores and postop follow-up imaging. Results: Of the 45 patients evaluated, 93. 3% (42 patients) had either complete resolution of pleural effusions or partial resolution with an asymptomatic recovery within the first month post op. Chest pain was the most common postoperative complaint, which was present in 20% of patients. The mean postoperative ECOG score was 2± 1. 7. Patients with moderate to high-risk LENT scores had success rates of 96. 7% and 92. 3% respectively. Conclusion: Video-assisted thoracoscopic pleurodesis using Iodopovidone-iodine is an effective approach for MPEs. In developing countries where Iodopovidone iodine is readily available and affordable, patients may benefit from this agent with excellent results and minimal complications.

Patients with advanced heart failure (HF) symptoms constitute stage D heart failure with high mortality and less response to conventional guideline directed medical therapies. These patients are subjected to receive non-medical therapies including heart transplant or mechanical circulatory support for increasing survival. Considering the low availability and serious complications of these strategies, effective medical therapies for this group of patients would be pivotal for decreasing mortality and morbidity of them. Angiotensin receptor neprilysin inhibitor (ARNI) is a class of drugs approved for ambulatory heart failure patients. ARNI use like other groups of heart failure drugs has not been fully evaluated in end-stage heart failure patients. Herein, we describe four inotrope-dependent heart failure patients. Initiation of ARNI in these patients, lead to discontinuation of inotrope and reducing the need for inotrope in the follow-up period. . .

We report a case of 66-year-old woman with true aneurysm of the right brachial artery. She presented with acute upper extremity ischemia. The hand was cold and parenthesized and distal pulses were absent. CT angiography (CTA) revealed a 20*25 mm true brachial artery aneurysm. The aneurysm was thrombosed without distal run-off. We excised the aneurysm and reestablished the arterial flow by a reverse saphenous interposition graft. The postoperative course was uneventful. . .

Iatrogenic dissection of coronary arteries while performing catheter engagement, in general is not uncommon. However, we encountered a relatively rare case of iatrogenic right coronary cusp dissection. Here we report an iatrogenic coronary artery dissection after diagnostic angiography in a 54-year-old woman presented with exertional dyspnea and chest discomfort. In our case delayed progression of sub-intimal hematoma and subsequent compression of RCA ostium an SA node branch was the cause of SA node dysfunction and subsequent junctional rhythm and atrial fibrillation. To conclude it should be said that in catastrophic cases of iatrogenic coronary ostia dissection and ensuing aortic cusp involvement, stenting of entry point at coronary ostia is a logical decision with good result. . .

I n December 2019, the novel coronavirus disease 2019 (COVID-19) outbreak appeared with severe acute respiratory distress syndrome in Wuhan, china. The disease soon began to spread all over the world; so that, it was literally announced by World Health Organization (WHO) as a pandemic in March 2020. 1 Since then, the disease has affected millions of people and became a huge matter of concern for the world health policies. . .