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Paroxysmal supraventricular tachycardia (PSVT) - Biotech, Pharma and Life Science Channel

21:15 EST 18th January 2017 | BioPortfolio

Paroxysmal supraventricular tachycardia (PSVT) is episodes of rapid heart rate that start in a part of the heart above the ventricles. "Paroxysmal" means from time to time.

The heart will suddenly start racing, then stop or slow down abruptly.  Episodes can last for seconds, minutes, hours or (in rare cases) days. They may occur regularly, several times a day, or very infrequently, once or twice a year.  The heart rate may be as high as 250 beats per minute, but is usually between 140 and 180 (a normal heartbeat should be 60-100 beats per minute at rest).

SVT is caused by abnormal electrical impulses that start suddenly in the upper chambers of your heart (the atria). These impulses override your heart's natural rhythm.  It is often a short circuit in the electrical system of your heart that causes these spontaneous impulses. The short circuit causes an electrical signal to travel continuously around in a circle. Each time the signal completes the circuit, the impulse spreads out to the rest of your heart, forcing it to beat rapidly.  SVT attacks often happen for no obvious reason. However, they may be triggered by a change in posture, exertion, emotional upset, coffee or alcohol.

Source: http://www.nhs.uk/conditions/Supraventricular-tachycardia/Pages/Introduction.aspx

View research papers on diagnosiscauses and treatment.

PubMed Articles [290 Associated PubMed Articles listed on BioPortfolio]

Concealed Accessory Pathways with a Single Ventricular and Two Discrete Atrial Insertion Sites.

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Junctional Ectopic Tachycardia Localization and Procedural Approach using Cryoablation.

Idiopathic junctional ectopic tachycardia (JET) may still be difficult to control with antiarrhythmic therapy. Transcatheter ablation can be challenging and may be associated with a high risk of unint...

Differential diagnosis of a paroxysmal neurological event: Do neurologists know how to clinically recognize it?

To investigate ability to recognize paroxysmal neurological events (PNE) based on video-recorded events alone in a group of physicians treating prevalent neurological conditions.

Endoepicardial Ventricular Tachycardia Ablation With a New High-density Non-fluoroscopic Navigation System.

Comparison of catheter ablation for paroxysmal atrial fibrillation between cryoballoon and radiofrequency: a meta-analysis.

The present systematic review and meta-analysis aimed to assess and compare the safety and efficacy of radiofrequency (RF) and cryoballoon (CB) ablation for paroxysmal atrial fibrillation (PAF). RF an...

MAGNETIC VT study: a prospective, multicenter, post-market randomized controlled trial comparing VT ablation outcomes using remote magnetic navigation-guided substrate mapping and ablation versus manual approach in a low LVEF population.

Patients with ischemic cardiomyopathy (ICM) are prone to scar-related ventricular tachycardia (VT). The success of VT ablation depends on accurate arrhythmogenic substrate localization, followed by op...

Rapid infusions of human normal immunoglobulin 50g/l are safe and well tolerated in immunodeficiencies and immune thrombocytopenia.

Intravenous immunoglobulin (IVIg) is accepted as an effective and well-tolerated treatment for primary and secondary immunodeficiencies (ID) and immune thrombocytopenia (ITP). Adverse reactions of IVI...

Early Fever As a Predictor of Paroxysmal Sympathetic Hyperactivity in Traumatic Brain Injury.

Paroxysmal sympathetic hyperactivity (PSH) is characterized by episodic, hyperadrenergic alterations in vital signs after traumatic brain injury (TBI). We sought to apply an objective scale to the vit...

Novel compound heterozygous TBC1D24 mutations in a boy with infantile focal myoclonic epilepsy and literature review.

Objective: To investigate the clinical features and genetic characteristics of patients with TBC1D24 gene mutations. Method: The clinical data of a patient with novel TBC1D24 compound heterozygous mut...

Paroxysmal atrial fibrillation cured through surgical repair of a large paraoesophageal hernia.

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Saline-Enhanced Radiofrequency (SERF) Catheter Ablation for the Treatment of Ventricular Tachycardia

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Epicardial Fat Pads Ablation During Coronary Surgery

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Medical and Biotech [MESH] Definitions

A generic expression for any tachycardia that originates above the BUNDLE OF HIS.

A rare form of supraventricular tachycardia caused by automatic, not reentrant, conduction initiated from sites at the atrioventricular junction, but not the ATRIOVENTRICULAR NODE. It usually occurs during myocardial infarction, after heart surgery, or in digitalis intoxication with a HEART RATE ranging from 140 to 250 beats per minute.

Abnormally rapid heartbeats with sudden onset and cessation.

An abnormally rapid ventricular rhythm usually in excess of 150 beats per minute. It is generated within the ventricle below the BUNDLE OF HIS, either as autonomic impulse formation or reentrant impulse conduction. Depending on the etiology, onset of ventricular tachycardia can be paroxysmal (sudden) or nonparoxysmal, its wide QRS complexes can be uniform or polymorphic, and the ventricular beating may be independent of the atrial beating (AV dissociation).

A condition characterized by the recurrence of HEMOGLOBINURIA caused by intravascular HEMOLYSIS. In cases occurring upon cold exposure (paroxysmal cold hemoglobinuria), usually after infections, there is a circulating antibody which is also a cold hemolysin. In cases occurring during or after sleep (paroxysmal nocturnal hemoglobinuria), the clonal hematopoietic stem cells exhibit a global deficiency of cell membrane proteins.

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