preexcitation

preexcitation

 [pre-ek″si-ta´shun]
abnormal premature activation of part of the ventricular myocardium, signifying conduction of some of the activating impulses by routes outside the normal ones.

pre·ex·ci·ta·tion

(prē'ek-sī-tā'shŭn),
Premature activation of part of the ventricular myocardium by an impulse that travels by an anomalous path and so avoids physiologic delay in the atrioventricular junction; an intrinsic part of the Wolff-Parkinson-White syndrome.

preexcitation

/pre·ex·ci·ta·tion/ (pre-ek″si-ta´shun) premature activation of a portion of the ventricles due to transmission of cardiac impulses along an accessory pathway not subject to the physiologic delay of the atrioventricular node; sometimes used as a synonym of Wolff-Parkinson-White syndrome.

preexcitation

[prē′eksitā′shən]
Etymology: L, prae + excitare, to arouse
activation of part of the ventricular myocardium earlier than would be expected if the activating impulses traveled only down the normal routes and had experienced a normal delay within the atrioventricular (AV) node. Preexcitation may be a result of either an AV accessory pathway (Wolff-Parkinson-White syndrome), which is reflected on the electrocardiogram by a short P-R interval and a broad QRS complex, or an excessively fast intranodal pathway (Lown-Ganong-Levine syndrome), which manifests with a short P-R interval and a normal QRS complex. The degree of preexcitation is determined by the speed at which the impulse traverses the atrial tissue and the accessory pathway or the AV node. See also accessory pathway.

pre·ex·ci·ta·tion

(prē'ek-sī-tā'shŭn)
Premature activation of part of the ventricular myocardium by an impulse that travels by an anomalous path and so avoids physiologic delay in the atrioventricular junction; an intrinsic part of the Wolff-Parkinson-White syndrome.
References in periodicals archive ?
12 seconds), and delta waves (best seen in leads II, III, aVF, V1, V3-V6), are features of ventricular preexcitation of the Wolff-ParkinsonWhite type (WPW).
Patients at the onset had one or more symptoms, including seizures (54%), muscle weakness (29%), headache complicated with vomiting (25%), decreased vision (18%), hearing loss (10%), impaired verbal communication (6%), and heart preexcitation syndrome (5%).
To facilitate the planned ablation and to minimize catheter related injury, it is vital to predict the accessory pathway location based on analysis of a 12-lead electrocardiogram demonstrating preexcitation.
It explains technical aspects and general concepts of electrophysiologic investigation, sinus node function, atrioventricular conduction, intraventricular conduction disturbances, miscellaneous phenomena related to atrioventricular conduction, ectopic rhythms and premature depolarizations, supraventricular tachycardias, atrial flutter and fibrillation, preexcitation syndromes, recurrent ventricular tachycardia, the evaluation of antiarrhythmic agents, and catheter and surgical ablation in the therapy of arrhythmias.
Also, she was diagnosed with polycystic ovarian syndrome, treated with birth control pills, bilateral kidney micro stones, sinus tachycardia and ventricular preexcitation syndrome.
Decimeter spatial resolution by using differential preexcitation BOTDA pulse technique, IEEE Sensors Journal, 11,2344-2348.
Exclusion criteria: Patients were excluded if they had any of the following conditions: (1) acute myocardial infarction cardiomyopathy or valvular heart disease (2) abnormal electrocardial activity including cardiac conduction disturbances rapid arrhythmia left ventricular supervoltage and preexcitation syndrome (3) ST-segment deviation due to abnormal electrolytes and drugs.
Cardiac rhabdomyomas can involve the cardiac conducting system and thereby may predispose an affected individual to ventricular preexcitation or other arrhythmias not only in infancy but also later in life.
Short PR interval and delta wave is the expression of preexcitation caused by accessory pathway.
Exclusion criteria were as follows: acute coronary syndrome, prior myocardial infarction and coronary artery stenosis higher than 40% either in ectatic coronary artery or in the nonectatic coronary arteries, congestive heart failure, left ventricular (LV) hypertrophy, chronic obstructive pulmonary disease, valvular heart disease, permanent pacemaker implantation, atrial fibrillation, frequent ventricular preexcitation and atrioventricular conduction abnormalities, medications known to alter cardiac conduction, peripheral vascular diseases, pulmonary or neurological disease, pericarditis, congenital heart disease, alcohol abuse, and renal, hepatic, or thyroid disease.
Transgenic mouse model of ventricular preexcitation and atrioventricular reentrant tachycardia induced by an AMP-activated protein kinase loss-of-function mutation responsible for Wolff-Parkinson-White syndrome.