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Wolff-Parkinson-White syndrome (WPW) is a syndrome of pre-excitation of the ventricles of the heart due to an accessory pathway known as the Bundle of Kent. This accessory pathway is an abnormal electrical communication from the atria to the ventricles. Image File history File links Diagram_of_the_human_heart_(cropped). ...
The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The following codes are used with International Statistical Classification of Diseases and Related Health Problems. ...
// I00-I99 - Diseases of the circulatory system (I00-I02) Acute rheumatic fever (I00) Rheumatic fever without mention of heart involvement (I01) Rheumatic fever with heart involvement (I02) Rheumatic chorea (I05-I09) Chronic rheumatic heart diseases (I05) Rheumatic mitral valve diseases (I050) Mitral stenosis (I051) Rheumatic mitral insufficiency (I06) Rheumatic aortic...
The International Statistical Classification of Diseases and Related Health Problems (commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ...
The Mendelian Inheritance in Man project is a database that catalogues all the known diseases with a genetic component, and - when possible - links them to the relevant genes in the human genome. ...
The Diseases Database is a free website that provides information about the relationships between medical conditions, symptoms, and medications. ...
eMedicine is an online clinical medical knowledge base that was founded in 1996. ...
Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ...
In the heart, a ventricle is a heart chamber which collects blood from an atrium (another heart chamber that is smaller than ventricle) and pumps it out of the heart. ...
The heart and lungs, from an older edition of Grays Anatomy. ...
In anatomy, the atrium (plural: atria) is the blood collection chamber of a heart. ...
The incidence of WPW syndrome is between 0.1 and 3 % of the general population.[1] [2] [3]
While the vast majority of individuals with WPW syndrome remain asymptomatic throughout their entire lives, there is a risk of sudden death associated with the syndrome. Sudden death due to WPW syndrome is rare (incidence of ≤0.6%[3] [4]), and is due to the effect of the accessory pathway on tachyarrhythmias in these individuals. In medicine, a disease is asymptomatic when it is at a stage where the patient does not experience symptoms. ...
A cardiac arrhythmia, also called cardiac dysrhythmia, is a disturbance in the regular rhythm of the heartbeat. ...
Pathophysiology
In normal individuals, electrical activity in the heart is initiated in the sinoatrial (SA) node (located in the right atrium), propagates to the atrioventricular (AV) node, and then through the bundle of His to the ventricles of the heart. (See electrical conduction system of the heart). The sinoatrial node (abbreviated SA node, also called the sinus node) is the impulse generating (pacemaker) tissue located in the right atrium of the heart. ...
This page is about the muscular organ, the Heart. ...
The atrioventricular node (abbreviated AV node) is the tissue between the atria and the ventricles of the heart, which conducts the normal electrical impulse from the atria to the ventricles. ...
The bundle of His is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node (located between the atria and the ventricles) to the point of the apex of the fascicular branches. ...
The EKG complex. ...
The AV node acts as a gatekeeper, limiting the electrical activity that reaches the ventricles of the heart. This function of the AV node is important, because if the signals generated in the atria of the heart were to increase in rate (as they do during atrial fibrillation or atrial flutter), the AV node will limit the electrical activity that conducts to the ventricles. For instance, if the atria are electrically activated at 300 beats per minute, half those electrical impulses are blocked by the AV node, so that the ventricles are activated at 150 beats per minute (giving a pulse of 150 beats per minute). Another important property of the AV node is that it slows down individual electrical impulses. This is manifest on the EKG as the PR interval, the time from activation of the atria (manifest as the P wave) and activation of the ventricles (manifest as the QRS complex). Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhythmia) which involves the two small, upper heart chambers (the atria). ...
Atrial flutter is a rhythmic, fast rhythm that occurs in the atria of the heart. ...
In medicine, a persons pulse is the throbbing of their arteries as an effect of the heart beat. ...
Lead II An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. ...
Individuals with WPW syndrome have an accessory pathway that connects the atria and the ventricles, in addition to the AV node. This accessory pathway is known as the bundle of Kent. This accessory pathway does not share the rate-slowing properties of the AV node, and may conduct electrical activity at a significantly higher rate than the AV node. For instance, in the example above, if an individual had an atrial rate of 300 beats per minute, the accessory bundle may conduct all the electrical impulses from the atria to the ventricles, causing the ventricles to activate at 300 beats per minute. The ventricles are not capable of activating in a uniform manner at rates that fast and will fibrillate instead (ventricular fibrillation). If not corrected rapidly, ventricular fibrillation leads to sudden cardiac death (SCD). Ventricular fibrillation (V-fib or VF) is a cardiac condition which consists of a lack of coordination of the contraction of the muscle tissue of the large chambers of the heart that eventually leads to the heart stopping altogether. ...
A cardiac arrest is the cessation of normal circulation of the blood due to failure of the ventricles of the heart to contract effectively during systole. ...
Diagnosis | | | One beat from a rhythm strip in V2 demonstrating characteristic findings in WPW syndrome. Note the characteristic delta wave (subtler here than in some cases), the short PR interval of 0.08 seconds, and the long QRS complex at 0.22 seconds. | WPW syndrome is commonly diagnosed on the basis of the surface EKG in an asymptomatic individual. In this case it is manifested as a delta wave, which is a slurred upstroke in the QRS complex that is associated with a short PR interval. WPW syndrome may also be noted on an EKG of an individual in cardiac arrest. In this case, the EKG will show a wide-complex tachycardia with widely varying morphologies of the QRS complexes with varying rates. This EKG finding is due to atrial fibrillation with rapid conduction down the accessory pathway. Characteristic EKG finding in WPW syndrome. ...
Lead II An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. ...
Lead II An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. ...
In medicine, a disease is asymptomatic when it is at a stage where the patient does not experience symptoms. ...
When an individual is in normal sinus rhythm, the EKG characteristics of WPW syndrome are a short PR interval, widened QRS complex (greater than 120 ms in length) with slurred upstroke of the QRS complex, and secondary repolarization changes reflected in ST segment-T wave changes. The normal electrical conduction in the heart allows the impulse that is generated by the SA node of the heart to be propagated to (and stimulate) the myocardium (muscle of the heart). ...
In individuals with WPW syndrome, electrical activity that is initiated in the SA node travels through the accessory pathway as well as through the AV node to activate the ventricles via both pathways. Since the accessory pathway does not have the impulse slowing properties of the AV node, the electrical impulse first activates the ventricles via the accessory pathway, and immediately afterwards via the AV node. This gives the short PR interval and slurred upstroke to the QRS complex known as the delta wave.
Patients with WPW often exhibit more than one accessory pathway, and in some patients as many as eight additional abnormal pathways can be found. This has been seen in individuals with Ebstein's anomaly. Ebsteins anomaly is a congenital heart defect in which the opening of the tricuspid valve is displaced towards the apex of the right ventricle of the heart. ...
Wolff-Parkinson-White syndrome is sometimes associated with Leber's hereditary optic neuropathy (LHON), a form of mitochondrial disease.[5] Leber’s hereditary optic neuropathy (LHON) or Leber optic atrophy is a mitochondrially inherited (mother to all offspring) form of acute or subacute loss of central vision that may lead to degeneration of retinal ganglion cells (RGCs) and their axons; this affects predominantly young adult males. ...
Mitochondrial diseases are a group of disorders relating to the mitochondria, the organelles that are the powerhouses of the eukaryotic cells that comprise higher-order lifeforms (including humans). ...
Risk stratification | | | 12 lead EKG of an individual with WPW syndrome. The accessory pathway is located in the left posteroseptal region. | Treatment is based on risk stratification of the individual. Risk stratification is performed to determine which individuals with WPW syndrome are at risk for sudden cardiac death (SCD). Sudden cardiac death in these individuals is due to the propagation of an atrial arrhythmia to the ventricles at a very high rate. Download high resolution version (1198x550, 426 KB)A 12 lead EKG demonstrating Wolff-Parkinson-White syndrome with characteristic delta waves. ...
Lead II An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. ...
A good history should be taken to determine whether an individual has factors suggestive of a previous episode of unexplained syncope or palpitations. These may be due to earlier episodes of a tachycardia associated with the accessory pathway. Syncope has two distinct and apparantly unrelated meanings, one in linguistics and another in medicne. ...
A palpitation is an abnormal, rapid beating of the heart, brought on by overexertion, disease or drugs. ...
Individuals with WPW syndrome in whom the delta waves disappear with increases in the heart rate are considered at lower risk of SCD. This is because the loss of the delta wave shows that the accessory pathway cannot conduct electrical impulses at a high rate (in the anterograde direction). These individuals will typically not have fast conduction down the accessory pathway during episodes of atrial fibrillation.
Risk stratification is best performed via programmed electrical stimulation (PES) in the cardiac electrophysiology lab. This is an invasive procedure, in which the rate of impulse propogation via the accessory pathway is determined by stimulating the atria and by inducing transient atrial fibrillation. An electrophysiologic study (EPS) is one of a number of tests of the electrical conduction system of the heart performed by a cardiac electrophysiologist, a specialist in the electrical conduction system of the heart. ...
Cardiac electrophysiology is the science of the electric functioning of the heart. ...
Atrial fibrillation (AF or afib) is an abnormal heart rhythm (cardiac arrhythmia) which involves the two small, upper heart chambers (the atria). ...
High risk features that may be present during PES include an effective refractory period of the accessory pathway less than 270 ms, multiple pathways, septal location of pathway, and inducibility of supraventricular tachycardia. Individuals with any of these high risk features are generally considered at increased risk for SCD and should be treated accordingly.[6]
It is unclear whether invasive risk stratification (with programmed electrical stimulation) is necessary in the asymptomatic individual.[7] While some groups advocate PES for risk stratification in all individuals under 35 years old, others only offer it to individuals who have history suggestive of a tachyarrhythmia, since the incidence of sudden death is so low.[3][4] This article or section does not cite its references or sources. ...
Treatment Acutely, people with WPW who are experiencing a tachydysrhythmia may require electrical cardioversion if their condition is critical, or, if more stable, medical treatment may be used. Patients with atrial fibrillation and rapid ventricular response are often treated with procainamide to stabilize their heart rate. Patients with a rapid heart beat with narrow QRS complexes (circus movement tachycardias) may also be cardioverted, alternatively, adenosine may be administered if equipment for cardioversion is immediately available as a backup. Through electricity or drug therapy, cardioversion converts heart arrhythmias to normal rhythms. ...
Procainamide (trade name Pronestyl®) is a pharmaceutical antiarrhythmic agent used for the medical treatment of cardiac arrhythmias, classified by the Vaughan Williams classification system as class Ia. ...
The QRS complex is a record of the measurement of the movement of electrical impulses through the lower heart chambers (ventricles). ...
The chemical structure of adenosine Adenosine is a nucleoside comprised of adenine attached to a ribose (ribofuranose) moiety via a β-N9-glycosidic bond. ...
The definitive treatment of WPW syndrome is destruction of the abnormal electrical pathway by radiofrequency catheter ablation. This procedure is performed almost exclusively by cardiac electrophysiologists. Radiofrequency catheter ablation is not performed in all individuals with WPW syndrome because there are inherent risks involved in the procedure. Catheter ablation is an invasive procedure used to remove a faulty electrical pathway from the hearts of those who are prone to developing cardiac arrhythmias such as supraventricular tachycardias (SVT) and Wolff-Parkinson-White syndrome. ...
Cardiac electrophysiology is the science of the electric functioning of the heart. ...
When performed by an experienced electrophysiologist, radiofrequency ablation has a high success rate.[8] If radiofrequency catheter ablation is successfully performed, the patient is generally considered cured. Recurrence rates are typically less than 5 % after a successful ablation.[8] The one caveat is that individuals with underlying Ebstein's anomaly may develop additional accessory pathways during progression of their disease. Ebsteins anomaly is a congenital heart defect in which the opening of the tricuspid valve is displaced towards the apex of the right ventricle of the heart. ...
References - ^ Rosner MH, Brady WJ Jr, Kefer MP, Martin ML. (1999). "Electrocardiography in the patient with the Wolff-Parkinson-White syndrome: diagnostic and initial therapeutic issues". American Journal of Emergency Medicine 17 (7): 705-14. PMID 10597097.
- ^ (Italian) Sorbo MD, Buja GF, Miorelli M, Nistri S, Perrone C, Manca S, Grasso F, Giordano GM, Nava A. (1995). "The prevalence of the Wolff-Parkinson-White syndrome in a population of 116,542 young males". Giornale Italiano di Cardiologia 25 (6): 681-7. PMID 7649416.
- ^ a b c Munger TM, Packer DL, Hammill SC, Feldman BJ, Bailey KR, Ballard DJ, Holmes DR Jr, Gersh BJ. (1993). "A population study of the natural history of Wolff-Parkinson-White syndrome in Olmsted County, Minnesota, 1953-1989". Circulation. 87 (3): 866-73. PMID 8443907.
- ^ a b Fitzsimmons PJ, McWhirter PD, Peterson DW, Kruyer WB (2001). "The natural history of Wolff-Parkinson-White syndrome in 228 military aviators: a long-term follow-up of 22 years". American Heart Journal 142 (3): 530-6. PMID 11526369 DOI:10.1067/mhj.2001.117779.
- ^ Mashima Y, Kigasawa K, Hasegawa H, Tani M, Oguchi Y. (1996). "High incidence of pre-excitation syndrome in Japanese families with Leber's hereditary optic neuropathy". Clinical Genetics 50 (6): 535-7. PMID 9147893. Fulltext (subscription required)
- ^ Pappone C, Santinelli V, Manguso F, Augello G, Santinelli O, Vicedomini G, Gulletta S, Mazzone P, Tortoriello V, Pappone A, Dicandia C, Rosanio S. (2003). "A randomized study of prophylactic catheter ablation in asymptomatic patients with the Wolff-Parkinson-White syndrome". New England Journal of Medicine 349 (19): 1803-11. PMID 14602878. Fulltext (free registration required)
- ^ Campbell RM, Strieper MJ, Frias PA, Collins KK, Van Hare GF, Dubin AM (2003). "Survey of current practice of pediatric electrophysiologists for asymptomatic Wolff-Parkinson-White syndrome". Pediatrics 111 (3): e245-7. PMID 12612279.
- ^ a b (Italian) Pappone C, Lamberti F, Santomauro M, Stabile G, De Simone A, Turco P, Pannain S, Loricchio ML, Rotunno R, Chiariello M (1993). "Ablation of paroxysmal tachycardia in Wolff-Parkinson-White syndrome". Cardiologia 38 (12 Suppl 1): 189-97. PMID 8020017.
Adeosine is contraindicated for patients in atrial fibrillation or atrial flutter with a history of WPW A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ...
See also Lown-Ganong-Levine syndrome (LGL) is a syndrome of pre-excitation of the ventricles due to an accessory pathway providing an abnormal electrical communication from the atria to the ventricles. ...
Cardiac electrophysiology is the science of the electric functioning of the heart. ...
The EKG complex. ...
Lead II An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm) is a graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. ...
An electrophysiologic study (EPS) is one of a number of tests of the electrical conduction system of the heart performed by a cardiac electrophysiologist, a specialist in the electrical conduction system of the heart. ...
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