Wolff-Parkinson-White Syndrome Publications (5968)

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Wolff-Parkinson-White Syndrome Publications

2016Dec
Trends Cardiovasc. Med.
Trends Cardiovasc Med 2016 Dec 5. Epub 2016 Dec 5.
Bluhm Cardiovascular Institute, Northwestern Memorial Hospital, 676 St. Clair, Suite 600, Chicago, IL 60611, USA; Northwestern University, Feinberg School of Medicine, 676 St. Clair, Suite 600, Chicago, IL 60611, USA. Electronic address:

For years, conventional wisdom has held that patients with asymptomatic ventricular pre-excitation (asymptomatic WPW or WPW pattern) were at low risk for adverse outcomes. This assumption has been challenged more recently in a number of observational/natural history studies as well as in prospective trials in which patients were more aggressively studied via invasive electrophysiology study (EPS) and more aggressively treated, in some cases, with pre-emptive catheter ablation, despite the lack of symptoms. In sum, the data do not definitively support one approach (early, up-stream EPS and/or ablation) vs. Read More

the other (watchful waiting with close monitoring). The most recent pediatric and adult guidelines reflect this ambiguity with a broad spectrum of approaches endorsed.

2017Jan
Cardiol Young
Cardiol Young 2017 Jan;27(S1):S62-S67
2Heart Center, Department ofPediatric Cardiology,Phoenix Children's Hospital,University of Arizona College of Medicine-Phoenix,Phoenix, Arizona,United States of America.

The Wolff-Parkinson-White pattern refers to the electrocardiographic appearance in sinus rhythm, wherein an accessory atrioventricular pathway abbreviates the P-R interval and causes a slurring of the QRS upslope - the "delta wave". It may be asymptomatic or it may be associated with orthodromic reciprocating tachycardia; however, rarely, even in children, it is associated with sudden death due to ventricular fibrillation resulting from a rapid response by the accessory pathway to atrial fibrillation, which itself seems to result from orthodromic reciprocating tachycardia. Historically, patients at risk for sudden death were characterised by the presence of symptoms and a shortest pre- excited R-R interval during induced atrial fibrillation <250 ms. Read More

Owing to the relatively high prevalence of asymptomatic Wolff-Parkinson-White pattern and availability of catheter ablation, there has been a need to identify risk among asymptomatic patients. Recent guidelines recommend invasive evaluation for such patients where pre-excitation clearly does not disappear during exercise testing. This strategy has a high negative predictive value only. The accuracy of this approach is under continued investigation, especially in light of other considerations: Patients having intermittent pre-excitation, once thought to be at minimal risk may not be, and the role of isoproterenol in risk assessment.

2017Jan
J Interv Card Electrophysiol
J Interv Card Electrophysiol 2017 Jan 4. Epub 2017 Jan 4.
Department of Cardiology, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin, China.
2017Jan
Cold Spring Harb Mol Case Stud
Cold Spring Harb Mol Case Stud 2017 Jan;3(1):a001271
NIHR Cardiovascular Biomedical Research Unit at Royal Brompton and Harefield NHS Foundation Trust and Imperial College London, London SW3 6NP, United Kingdom;; National Heart and Lung Institute, Imperial College London, London SW3 6NP, United Kingdom;; MRC Clinical Sciences Centre, Imperial College London, London W12 0NN, United Kingdom.

Olympic athletes represent model of success in our society, by enduring strenuous conditioning programmes and achieving astonishing performances. They also raise scientific and clinical interest, with regard to medical care and prevalence of cardiovascular (CV) abnormalities.
Our aim was to assess the prevalence and type of CV abnormalities in this selected athlete's cohort. Read More


2352 Olympic athletes, mean age 25±6, 64% men, competing in 31 summer or 15 winter sports, were examined with history, physical examination, 12-lead and exercise ECG and echocardiography. Additional testing (cardiac MRI, CT scan) or electrophysiological assessments were selectively performed when indicated.
Prevalence and type of CV findings, abnormalities and diseases found in Olympic athletes over 10 years.
A subset of 92 athletes (3.9%) showed abnormal CV findings. Structural abnormalities included inherited cardiomyopathies (n=4), coronary artery disease (n=1), perimyocarditis (n=4), myocardial bridges (n=2), valvular and congenital diseases (n=45) and systemic hypertension (n=10). Primary electrical diseases included atrial fibrillation (n=2), supraventricular reciprocating tachycardia (n=14), complex ventricular tachyarrhythmias (non-sustained ventricular tachycardia, n=7; bidirectional ventricular tachycardia, n=1) or major conduction disorders (Wolff-Parkinson-White (WPW), n=1; Long QT syndrome (LQTS), n=2).
Our study revealed an unexpected prevalence of CV abnormalities among Olympic athletes, including a small, but not negligible proportion of pathological conditions at risk. This observation suggests that Olympic athletes, despite the absence of symptoms or astonishing performances, are not immune from CV disorders and might be exposed to unforeseen high-risk during sport activity.

2016Dec
Cell Rep
Cell Rep 2016 Dec;17(12):3292-3304
Department of Genetics, Harvard Medical School, Boston, MA 02115, USA; Division of Cardiovascular Medicine, Brigham and Women's Hospital, Boston, MA 02115, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. Electronic address:

AMP-activated protein kinase (AMPK) is a metabolic enzyme that can be activated by nutrient stress or genetic mutations. Missense mutations in the regulatory subunit, PRKAG2, activate AMPK and cause left ventricular hypertrophy, glycogen accumulation, and ventricular pre-excitation. Using human iPS cell models combined with three-dimensional cardiac microtissues, we show that activating PRKAG2 mutations increase microtissue twitch force by enhancing myocyte survival. Read More

Integrating RNA sequencing with metabolomics, PRKAG2 mutations that activate AMPK remodeled global metabolism by regulating RNA transcripts to favor glycogen storage and oxidative metabolism instead of glycolysis. As in patients with PRKAG2 cardiomyopathy, iPS cell and mouse models are protected from cardiac fibrosis, and we define a crosstalk between AMPK and post-transcriptional regulation of TGFβ isoform signaling that has implications in fibrotic forms of cardiomyopathy. Our results establish critical connections among metabolic sensing, myocyte survival, and TGFβ signaling.

2016Dec
J Emerg Med
J Emerg Med 2016 Dec 13. Epub 2016 Dec 13.
The University of Texas at Austin, Dell Medical School, Dell Children's Medical Center of Central Texas, Austin, Texas.

The work-up and initial management of a critically ill neonate is challenging and anxiety provoking for the Emergency Physician. While sepsis and critical congenital heart disease represent a large proportion of neonates presenting to the Emergency Department (ED) in shock, there are several additional etiologies to consider. Underlying metabolic, endocrinologic, gastrointestinal, neurologic, and traumatic disorders must be considered in a critically ill infant. Read More

Several potential etiologies will present with nonspecific and overlapping signs and symptoms, and the diagnosis often is not evident at the time of ED assessment.
We present the case of a neonate in shock, with a variety of nonspecific signs and symptoms who was ultimately diagnosed with tachycardia-induced cardiomyopathy secondary to a resolved dysrhythmia. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: This case highlights the diagnostic and therapeutic approach to the critically ill neonate in the ED, and expands the differential diagnosis beyond sepsis and critical congenital heart disease. Knowledge of the potential life-threatening etiologies of shock in this population allows the Emergency Physician to appropriately test for, and empirically treat, several potential etiologies simultaneously. Additionally, we discuss the diagnosis and management of supraventricular tachycardia and Wolff-Parkinson-White syndrome in the neonatal and pediatric population, which is essential knowledge for an Emergency Physician.

Data regarding long-term follow-up of radiofrequency catheter ablation (RFCA) of accessory pathways (APs) in patients with Ebstein's anomaly (EA) are limited. The procedures are challenging due to multiple or wide APs.
Analysis was performed on clinical and periprocedural data of patients with EA referred to the centre in order to perform catheter ablation of accessory pathway (AP). Read More

The group consisted of 22 patients (female 40.9%, mean age 33.6 ± 19.1 years). The follow-up utilized electrocardiogram and Holter monitoring.
Twenty-two patients had 33 accessory pathways (8 patients had multiple APs, 11 patients broad AP). Twenty-nine different arrhythmias were ablated: 20 orthodromic atrioventricular reciprocating tachycardia (O-AVRT), 5 antidromic atrioventricular reciprocating tachycardia (A-AVRT), 3 slow/fast atrioventricular nodal reentry tachycardia (s/f AVNRT) and 1 cavotricuspid-isthmus-dependent atrial flutter (CTI-AFL). In 3 patients (13.6%) multiple ablation targets for RFCA ablation were observed. The acute procedural success rate after the first RFCA performed was: 100% for AVNRT, 77.3% for APs and 50.0% for CTI-AFL ablation. Follow-up (mean 95.7 ± 49.8 months) was completed in 86.4% of patients. One patient had paroxysmal atrial fibrillation not targeted during ablation. One patient died due to heart failure 12 years after RFCA. Three patients who underwent RFCA of accessory pathways in the mid-1990s were lost in follow-up.
Radiofrequency ablation in patients with EA is challenging but safe and have a high short-term as well as long-term success rate.

2016Nov
Cardiol Young
Cardiol Young 2016 Nov 21:1-4. Epub 2016 Nov 21.
Department of Pediatrics,Division of Pediatric Cardiology,New York-Presbyterian Morgan Stanley Children's Hospital,Columbia University Medical Center, New York,New York,United States of America.

Risk stratification of patients with Wolff-Parkinson-White syndrome for sudden death is a complex process, particularly in understanding the utility of the repeat exercise stress test. We report a case of an 18-year-old patient who was found to have a high-risk pathway by both invasive and exercise stress testing after an initial exercise stress test showing beat-to-beat loss of pre-excitation. Read More