1/8. Reversible catecholamine-induced cardiomyopathy in a heart transplant candidate without persistent or paroxysmal hypertension.BACKGROUND: Both dilated and hypertrophic cardiomyopathy have been reported in patients with pheochromocytoma, who were almost always hypertensive. The outcome frequently has been fatal, yet cardiac dysfunction can be reversible after medical or surgical therapy for the pheochromocytoma. methods: We report the case of a patient with dilated cardiomyopathy without persistent or paroxysmal hypertension, who was found to have a pheochromocytoma during initial medical evaluation. RESULTS: The identification and treatment of the pheochromocytoma led to significant improvement in cardiac function and cardiac transplantation was avoided. CONCLUSIONS: This case illustrates some unusual features in pheochromocytoma-induced cardiomyopathy: (1) absence of persistent or paroxysmal hypertension, (2) initial presentation with acute myocardial infarction and normal coronary arteries, and (3) recurrent episodes of nonsustained ventricular tachycardia.- - - - - - - - - - ranking = 1keywords = dysfunction (Clic here for more details about this article) |
2/8. First evidence of premature ventricular complex-induced cardiomyopathy: a potentially reversible cause of heart failure.tachycardia-induced cardiomyopathy is a well-recognized and reversible condition, but left ventricular dysfunction due to frequent isolated premature ventricular complexes (PVCs) has not been reported. We observed resolution of dilated cardiomyopathy in a patient after a focal source of PVCs was eliminated by radiofrequency ablation. In a subset of patients with heart failure, PVC-induced cardiomyopathy may be a potentially reversible cause of left ventricular dysfunction.- - - - - - - - - - ranking = 2175.1978605569keywords = ventricular dysfunction, left ventricular dysfunction, dysfunction (Clic here for more details about this article) |
3/8. A case of cardiomyopathy induced by premature ventricular complexes.tachycardia-induced cardiomyopathy is a well-known and reversible condition, but the left ventricular dysfunction caused by frequent isolated premature ventricular complexes (PVCs) has been rarely reported. Apparent dilated cardiomyopathy was resolved in a patient after the focal source of PVCs was eliminated by radiofrequency catheter ablation. echocardiography showed progressive improvement of the abnormal wall motion. Frequent PVCs could be the cause of left ventricular dysfunction in a subset of patients with dilated cardiomyopathy and radiofrequency ablation should be the choice of therapy in those patients.- - - - - - - - - - ranking = 2175.1978605569keywords = ventricular dysfunction, left ventricular dysfunction, dysfunction (Clic here for more details about this article) |
4/8. Premature ventricular contraction-induced concealed mechanical bradycardia and dilated cardiomyopathy:.Left ventricular (LV) dysfunction due to frequent isolated premature ventricular contractions (PVCs) has been rarely reported. LV dysfunction and concealed mechanical bradycardia resolved in a patient with idiopathic dilated cardiomyopathy after the focal source of PVCs in the LV was eliminated by radiofrequency ablation (RFA). The patient remained free from PVCs and maintained normal LV function over 36-month follow-up. In a subset of patients with idiopathic dilated cardiomyopathy with frequent isolated PVCs, RFA of the arrhythmic focus restores normal LV function that can be long lasting.- - - - - - - - - - ranking = 2keywords = dysfunction (Clic here for more details about this article) |
5/8. dengue myocarditis.We report a 13-year-old boy who developed bradycardia and hypotension a day after recovery from dengue hemorrhagic fever. His electrocardiogram, during the bradycardia, showed a junctional rhythm with a rate of 50 beats/minute. This is the first reported case of sinus node dysfunction following dengue infection.- - - - - - - - - - ranking = 1keywords = dysfunction (Clic here for more details about this article) |
6/8. Transient left ventricular apical ballooning: a review of the literature.Transient left ventricular apical ballooning is a newly defined syndrome characterized by sudden onset of chest symptoms, electrocardiographic changes characteristic of myocardial ischemia, transient left ventricular dysfunction-particularly in the apical region, low-grade troponin elevation, and no significant coronary stenosis by angiogram. This syndrome is also referred to as takotsubo cardiomyopathy, "Ampulla" cardiomyopathy, Human Stress cardiomyopathy, and Broken Heart Syndrome. Emergency physicians, family physicians, general internists, and cardiologists may all encounter this syndrome at the point of contact. The similarity to acute coronary syndrome requires all clinicians who may potentially care for these patients to familiarize themselves with this newly recognized disease. We provide a recent case and review the current literature surrounding this syndrome.- - - - - - - - - - ranking = 1087.5989302784keywords = ventricular dysfunction, left ventricular dysfunction, dysfunction (Clic here for more details about this article) |
7/8. Transcatheter ablation through the cardiac veins in a patient with a biventricular device and left ventricular epicardial arrhythmias.Left ventricular outflow tract (LVOT) may be a source of repeated premature ventricular complexes (PVCs). In symptomatic patients, radiofrequency catheter ablation (RFCA) can be effective, either from endocardial or from epicardial sites. A 50-year-old patient, with dilated cardiomyopathy (DCM) and severe left ventricular (LV) dysfunction, left bundle branch block (LBBB), new york Heart association (NYHA) class IV, received a biventricular implantable cardioverter/defibrillator (ICD) in 2002. Despite drug therapy, PVCs were frequent (21.019/24 h) including prolonged runs, prompting ICD intervention. Premature ventricular complexes showed an inferior axis morphology, with an R/S ratio in V3>1, suggesting an LVOT origin. Despite the cardiac resynchronization therapy (CRT) device, successful RFCA was performed through the anterior venous branch, with a favourable clinical outcome. To our knowledge, this is the first case describing epicardial RFCA of a PVC focus from cardiac veins in the presence of a CRT device.- - - - - - - - - - ranking = 1keywords = dysfunction (Clic here for more details about this article) |
8/8. Tachycardiomyopathy induced by ventricular premature complexes: complete recovery after radiofrequency catheter ablation.ventricular premature complexes (VPCs) are known to be one of the most benign cardiac arrhythmias when they occur in structurally normal hearts. We experienced a 32-year old man who presented with dyspnea, palpitations and very frequent VPCs (31% of the total heart beats). echocardiography revealed a dilated left ventricle (LV 66 mm at end-diastole and 57 mm at end-systole) and a decreased ejection fraction (34%). Very frequent VPCs had been detected 10 years previously and he underwent a failed radiofrequency catheter ablation (RFCA) procedure at that time. The patient had been treated with heart failure medications including betablockers, ACE inhibitors and spironolactone for the two most recent years. Six months after we eliminated these VPCs with a second RFCA procedure, the heart returned to normal function and size. Long standing and very frequent VPCs could be the cause of left ventricular dysfunction in a subset of patients who suffer with dilated cardiomyopathy, and RFCA should be the choice of therapy for these patients.- - - - - - - - - - ranking = 1087.5989302784keywords = ventricular dysfunction, left ventricular dysfunction, dysfunction (Clic here for more details about this article) |