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Benign heart arrythmias

Stéphane Manzo-Silberman
Palpitations: frequent reason for referral to a cardiologist. Arrythmia: rare, mostly benign. Premature extra-beats and sustained tachy-arrhythmias: more frequent or revealed during pregnancy. Hemodynamic changes in expectant women favor an environment conducive to arrhythmogenesis. AF and flutter: very rare unless structural heart disease or hyperthyroidism. Drugs: careful monitoring of the patient and dose adjustments. Cardioversion: only in case of severe symptoms or hemodynamically unstable.
July 2015: La Presse Médicale
Ebru Aypar, Ahmet Sert, Dursun Odabaş
Chiari's network (CN) is an embryologic remnant of eustachian valve located in the right atrium (RA). Incomplete involution of the fetal sinus venosus valves results in ''redundant'' CN. CN has been found in 1.3-4 % of autopsy studies and is believed to be of little clinical consequence. However, a redundant CN may favor persistence of a patent foramen ovale, formation of an atrial septal aneurysm, atrial thrombus, or paradoxic embolism, or cause intense right-to-left shunting. It may also cause arrythmias or compromise cardiovascular functions...
April 2013: Pediatric Cardiology
Georges Serratrice, Jean-François Pellissier, Jacques Serra-Trice, Pierre-Jean Weiller
Interest in Morvan's disease or syndrome has grown, owing to its close links with various potassium channelopathies. Potassium is crucial for gating mechanisms (channel opening and closing), and especially for repolarization. Defective potassium regulation can lead to neuronal hyperexcitability. There are three families of potassium channels: voltage-gated potassium channels or VGKC (Kv1.1-Kv1.8), inward rectifier K+ channels (Kir), and two-pore channels (K2p). VGK channels are the commonest, and especially those belonging to the Shaker group (neuromyotonia and Morvan's syndrome, limbic encephalitis, and type 1 episodic ataxia)...
February 2010: Bulletin de L'Académie Nationale de Médecine
M A Downes, I M Whyte, G K Isbister
BACKGROUND: Several medications have been found to prolong the QT interval in overdose. This can predispose to torsade de pointes-type ventricular tachycardia. AIMS: To analyse the effects of moclobemide deliberate self-poisoning on the length of both QT and corrected QT (QTc) intervals. METHODS: Electrocardiograms (ECG) of all patients presenting to a regional toxicology service with moclobemide ingestion were reviewed. Cases where a cardiotoxic agent was coingested were excluded...
July 2005: Internal Medicine Journal
M Agirbasli, W B Hillegass, G D Chapman, B C Brott
We report here a case of a patient who underwent percutaneous intervention to the left anterior descending artery, complicated by thrombus formation within the myocardial bridge distal to the lesion. There was complete angiographic resolution of thrombus and restoration of the normal antegrade blood flow after infusion of glycoprotein IIb/IIIa antagonist (abciximab). Our observation may suggest that the presence of myocardial bridging distal to coronary lesions should be considered seriously in preprocedural evaluation of the lesions as a potential risk factor for intracoronary thrombus formation...
January 1998: Catheterization and Cardiovascular Diagnosis
D M See, J G Tilles
Although most cases of viral myocarditis are subclinical, some patients develop overt symptomatic disease. These patients may present with findings that range from benign myopericarditis to frank heart failure. Furthermore, a growing body of evidence links viral myocarditis with idiopathic dilated cardiomyopathy, sudden death, and chronic arrythmias. The pathogenesis of the disease is currently incompletely understood in humans but is being investigated in animal models. A multifactorial process involving direct viral damage, autoimmunity, and possibly vascular damage is emerging...
September 1991: Reviews of Infectious Diseases
A Dindogru, M Barcos, E S Henderson, H J Wallace
Two hundred and fifty-six patients with a wide variety of advanced neoplasms who were treated with adriamycin at Roswell Park Memorial Institute were studied for electrocardiographic changes. All the patients had pre- and posttreatment electrocardiograms (ECG's) and changes were found in 85 (33.2%). In the group of 1-8 patients with normal pretreatment ECG's, changes occurred in 51 (30.3%). In the group of 88 patients who had abnormal pretreatment ECG's, 34 (38.6%) developed further changes following treatment...
1978: Medical and Pediatric Oncology
P S Mayer, M B Wingate
On a number of occasions fetal heart arrythmias have been detected during the course of routine antepartum patient examination. A case is presented to illustrate the difficulty of making a definitive diagnosis of the nature of the arrythmia, and its significance in relation to fetal status. Investigation included stressed and nonstressed FHR monitoring, but a definitive diagnosis could not be made during the antepartum period and the patient could, therefore, not be assured of the essentially benign nature of the arrythmia until shortly after the birth of her child...
1976: International Journal of Gynaecology and Obstetrics
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