Hypertrophic Cardiomyopathy Predicts Thromboembolism and Heart Failure in Patients With Nonvalvular Atrial Fibrillation　- A Prospective Analysis From the Hokuriku-Plus AF Registry.

BACKGROUND: The prognostic effect of concomitant hypertrophic cardiomyopathy (HCM) on adverse events in patients with atrial fibrillation (AF) has not been evaluated in a multicenter prospective cohort study in Japan.Methods and Results: Using the Hokuriku-Plus AF Registry, 1,396 patients with nonvalvular AF (1,018 men, 72.3±9.7 years old) were assessed prospectively; 72 (5.2%) had concomitant HCM. During a median follow-up of 5.0 years (interquartile range 3.5-5.3 years), 79 cases of thromboembolism (1.3 per 100 person-years) and 192 of heart failure (HF) (3.2 per 100 person-years) occurred. Kaplan-Meier analysis revealed that the HCM group had a significantly greater incidence of thromboembolism (P=0.002 by log-rank test) and HF (P<0.0001 by a log-rank test) than the non-HCM group. The Cox proportional hazards model demonstrated that persistent AF (adjusted hazard ratio 2.98, 95% confidence interval 1.56-6.21), the CHA2DS2-VASc score (1.35, 1.18-1.54), and concomitant HCM (2.48, 1.16-4.79) were significantly associated with thromboembolism. Conversely, concomitant HCM (2.81, 1.72-4.43), older age (1.07, 1.05-1.10), lower body mass index (0.95, 0.91-0.99), a history of HF (2.49, 1.77-3.52), and lower left ventricular ejection fraction (0.98, 0.97-0.99) were significantly associated with the development of HF. CONCLUSIONS: Concomitant HCM predicts the incidence of thromboembolism and HF in AF patients.

Renal autonomic dynamics in hypertension: how can we evaluate sympathetic activity for renal denervation?

This review explores the various pathophysiological factors influencing antihypertensive effects, involving the regulation of vascular resistance, plasma volume, cardiac function, and the autonomic nervous system, emphasizing the interconnected processes regulating blood pressure (BP). The kidney's pivotal role in BP control and its potential contribution to hypertension is complicated but important to understand the effective mechanisms of renal denervation (RDN), which may be a promising treatment for resistant hypertension. Excessive stimulation of the sympathetic nervous system or the renin-angiotensin-aldosterone system (RAAS) can elevate BP through various physiological changes, contributing to chronic hypertension. Renal sympathetic efferent nerve activation leads to elevated norepinephrine levels and subsequent cascading effects on vasoconstriction, renin release, and sodium reabsorption. RDN reduces BP in resistant hypertension by potentially disrupting sensory afferent nerves, decreasing feedback activation to the central nervous system, and reducing efferent sympathetic nerve activity in the heart and other structures. RDN may also modulate central sympathetic outflow and inhibit renal renin-angiotensin system overactivation. While evidence for RDN efficacy in hypertension is increasing, accurate patient selection becomes crucial, considering complex interactions that vary among patients. This review also discusses methods to evaluate autonomic nerve activity from the golden standard to new potential examination for finding out optimization in stimulation parameters or rigorous patient selection based on appropriate biomarkers.

Danon Disease Presenting with Slowly Progressive Cardiomyopathy and Harboring a Novel Missense Variant in the Lysosome-associated Membrane Protein Type 2 (LAMP-2) gene: A Case Report.

Danon disease (DD) is a rare lysosomal storage disorder resulting from pathogenic variants of the lysosome-associated membrane protein type 2 (LAMP-2) gene. The disease is characterized by severe cardiomyopathy, which rapidly progresses to end-stage heart failure. This case, with DD caused by a missense variant, exhibited slow progressive cardiomyopathy and survived for an extended period despite being a male. A pathological analysis revealed that only a minority of the samples exhibited autophagic vacuoles with unique sarcolemmal features (AVSFs), which are typical of DD. Importantly, LAMP-2 expression was absent and the myocardial tissue contained a substantial amount of p62-positive aggregates.

Continuous drainage for the treatment of gastric cancer with pericardial metastasis and cardiac tamponade: A case report.

Key Clinical Message: Signet-ring cell gastric carcinomas presenting as pericardial effusion early in diagnosis are rare and associated with high mortality and a poor prognosis. There are two interesting aspects of this case: primary gastric carcinoma presenting as cardiac tamponade and the metastatic behavior of gastric signet-ring cell carcinoma. Abstract: This report describes an 83-year-old man diagnosed to have cardiac tamponade due to massive pericardial effusion. A cytological analysis of the pericardial effusion disclosed adenocarcinoma. The patient was treated with continuous pericardial drainage and the amount of pericardial effusion decreased.

A case of torsades de pointes due to takotsubo cardiomyopathy after common atrial flutter ablation.

Takotsubo cardiomyopathy (TCM) is a transient acute cardiac disorder often associated with QT prolongation, but this rarely leads to torsades de pointes (TdP). Additionally, it is a rare complication of catheter ablation. Here we report a case of TCM that developed after catheter ablation for common atrial flutter, which led to TdP. The patient was an 85-year-old male who had persistent supraventricular tachycardia, which was considered atrial flutter. The patient was hospitalized for congestive heart failure. Although the response to diuretic administration was unfavorable, heart failure improved with the combined use of rate control by landiolol. Catheter ablation was performed because of the possibility of tachycardia-induced cardiomyopathy. Tachycardia disappeared following ablation to the cavotricuspid isthmus, but the patient complained of severe pain during the ablation. Approximately 2 h after the treatment, the patient's heart failure re-exacerbated. The next day, electrocardiogram confirmed a marked QT prolongation, and TdP occurred. Although the phenomenon we experienced is rarely reported, it should be considered a complication following catheter ablation. Adequate analgesia, care for anxiety about treatment, and evaluation of cardiac condition after treatment are considered important. .

Adaptive cardiac resynchronization therapy for dilated cardiomyopathy with functional mitral regurgitation.

We report the case of a man in his 60s who had dilated cardiomyopathy with severe functional mitral regurgitation. Four years after a cardiac resynchronization therapy (CRT) device with an implantable cardioverter defibrillator was implanted, this device was replaced with an adaptive CRT device because of battery consumption. Seven months after replacement of this device, the left ventricular pacing to right ventricular activation and the atrioventricular delay from automatic adjustments contributed to less functional mitral regurgitation. The findings from our case suggest that optimal CRT, by measuring intracardiac conduction parameters, is effective for functional mitral regurgitation.