Hepatic T1-time, cardiac structure and function and cardiovascular outcomes in patients with dilated cardiomyopathy.

AIM: Liver damage frequently occurs in patients with cardiovascular (CV) disease and is associated with adverse clinical outcomes. The associations of liver damage with cardiac structure/function measures and the risk of adverse CV events in patients with dilated cardiomyopathy (DCM) are poorly known. METHODS: We retrospectively enrolled consecutive patients with DCM undergoing cardiac magnetic resonance imaging (MRI). In addition to standard cardiac assessment, iron-corrected T1 mapping was also assessed in the liver. Cross-sectional associations between hepatic T1-time and cardiac structure and function were examined accounting for potential confounders. Longitudinal associations between hepatic T1-time and the risk of hospitalization for HF or CV death were also assessed. RESULTS: Overall, 120 stable patients with established DCM were included in the study (mean age 54.7 years, 26 % women). The mean hepatic iron-corrected T1-time was 563±73 ms. In linear regression analyses, measures of left atrial structure (LA maximal volume, p = 0.035, LA minimal volume=0.012), interventricular septum thickness (p = 0.026), and right ventricular ejection fraction (p = 0.005) were significantly associated with greater hepatic T1-time. Over a mean follow-up of 4.5 ± 1.8 years, 32 (27 %) died or were hospitalized for HF at a rate of 6.7 per 100 person-year. Higher hepatic iron-corrected T1-time was independently associated with a higher risk of adverse events (adjusted-hazard ratio 1.71, 95 % confidence interval: 1.14-2.56, p = 0.009). Patients with a hepatic T1-time ≥563 ms had a higher risk of CV events (log-rank p = 0.03). CONCLUSION: Among stable patients with DCM, higher hepatic iron-corrected T1-time is associated with worse cardiac size and function and with higher rates of hospitalization for HF or CV death. CONDENSED ABSTRACT: Limited data exist regarding the clinical value of hepatic T1-time in patients with dilated cardiomyopathy (DCM) undergoing cardiac Magnetic Resonance imaging (MRI). We found that higher hepatic iron-corrected T1-time is associated with worse cardiac size and function, even after accounting for clinical confounders. Over a mean follow-up of 4.5 ± 1.8 years, higher hepatic iron-corrected T1-time was independently associated with a higher risk of hospitalization for heart failure or cardiovascular death. Among stable patients with DCM, the evaluation of liver tissue by cardiac MRI may provide useful clinical information for CV risk stratification.

Association of Tricuspid Regurgitation With Outcome in Acute Heart Failure.

BACKGROUND: Tricuspid regurgitation (TR) is common in chronic heart failure (HF) and is associated with negative prognosis. However, evidence on prognostic implications of TR in acute HF is lacking. We sought to investigate the association between TR and mortality and the interaction with pulmonary hypertension (PH) in patients admitted for acute HF. METHODS: We enrolled 1176 consecutive patients with a primary diagnosis of acute HF and with available noninvasive estimation of TR and pulmonary arterial systolic pressure. RESULTS: Moderate-severe TR was present in 352 patients (29.9%) and was associated with older age and more comorbidities. The prevalence of PH (ie, pulmonary arterial systolic pressure >40 mm Hg), right ventricular dysfunction, and mitral regurgitation was higher in moderate-severe TR. At 1 year, 184 (15.6%) patients died. Moderate-severe TR was associated with higher 1-year mortality risk after adjustment for other echocardiographic parameters (pulmonary arterial systolic pressure, left ventricle ejection fraction, right ventricular dysfunction, mitral regurgitation, left and right atrial indexed volumes; hazard ratio, 1.718; P=0.009), and the association with outcome was maintained when clinical variables (eg, natriuretic peptides, serum creatinine and urea, systolic blood pressure, atrial fibrillation) were added to the multivariable model (hazard ratio, 1.761; P=0.024). The association between moderate-severe TR and outcome was consistent in patients with versus without PH, with versus without right ventricular dysfunction, and with versus without left ventricle ejection fraction <50%. Patients with coexistent moderate-severe TR and PH had 3-fold higher 1-year mortality risk compared with patients with no TR or PH (hazard ratio, 3.024; P<0.001). CONCLUSIONS: In patients hospitalized for acute HF, the severity of TR is associated with 1-year survival, regardless of the presence of PH. The coexistence of moderate-severe TR and estimated PH was associated with a further increase in mortality risk. Our data must be interpreted in the context of potential underestimation of pulmonary arterial systolic pressure in patients with severe TR.

Incident Atrial Fibrillation and In-Hospital Mortality in SARS-CoV-2 Patients.

(1) Background: Among the different cardiovascular (CV) manifestations of the coronavirus disease 2019 (COVID-19), arrhythmia and atrial fibrillation (AF) in particular have recently received special attention. The aims of our study were to estimate the incidence of AF in patients hospitalized for COVID-19, and to evaluate its role as a possible predictor of in-hospital all-cause mortality. (2) Methods: We enrolled 3435 people with SARS-CoV2 infection admitted to three hospitals in Northern Italy from February 2020 to May 2021. We collected data on their clinical history, laboratory tests, pharmacological treatment and intensive care unit (ICU) admission. Incident AF and all-cause in-hospital mortality were considered as outcomes. (3) Results: 145 (4.2%) patients developed AF during hospitalization, with a median time since admission of 3 days (I-III quartile: 0, 12). Patients with incident AF were admitted more frequently to the ICU (39.3 vs. 12.4%, p < 0.001), and more frequently died (37.2 vs. 16.9%, p < 0.001). In the Cox regression model, the significant determinants of incident AF were age (HR: 1.041; 95% CI: 1.022, 1.060 per year), a history of AF (HR: 2.720; 95% CI: 1.508, 4.907), lymphocyte count (HR: 0.584; 95% CI: 0.384, 0.888 per 103/µL), estimated glomerular filtration rate (eGFR, HR: 0.988; 95% CI: 0.980, 0.996 per mL/min) and ICU admission (HR: 5.311; 95% CI: 3.397, 8.302). Incident AF was a predictor of all-cause mortality (HR: 1.405; 95% CI: 1.027, 1.992) along with age (HR: 1.057; 95% CI: 1.047, 1.067), male gender (HR: 1.315; 95% CI: 1.064; 1.626), dementia (HR: 1.373; 95% CI: 1.045, 1.803), lower platelet (HR: 0.997; 95% CI: 0.996, 0.998 per 103/µL) and lymphocyte counts (HR: 0.843; 95% CI: 0.725, 0.982 per 103/µL), C-Reactive protein values (HR: 1.004; 95% CI: 1.003, 1.005 per mg/L), eGFR (HR: 0.990; 95% CI: 0.986, 0.994 per mL/min), and ICU admission (HR: 1.759; 95% CI: 1.292, 2.395). (4) Conclusions: Incident AF is a common complication in COVID-19 patients during hospitalization, and its occurrence strongly predicts in-hospital mortality.