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Author(s):
David J Callans
Added:
3 years ago
Premature ventricular contractions (PVCs) are very common cardiac arrhythmias, detected on up to 75% of Holter monitors of ambulatory patients.1 Although PVCs in the setting of advanced structural heart disease have independent negative prognostic implications,2 the majority of PVCs are quite benign, associated with neither symptoms nor signals of future harm. For an important minority, PVCs…
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Author(s):
Jorge G Panizo
,
Sergio Barra
,
Greg Mellor
,
et al
Added:
3 years ago
Premature ventricular complexes (PVCs) are the most common ventricular arrhythmia. Their prognostic significance cannot be interpreted without considering the presence or absence of any associated underlying cardiac condition. In the absence of structural heart disease, PVCs were generally considered to be benign.1,2 In the 1970s and 1980s, it was postulated that frequent PVCs could be a trigger…
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Author(s):
Richard Schilling
Added:
3 years ago
Arrhythmia & Electrophysiology Review (AER) has become one of the key ways that clinicians interested in heart rhythm management stay up to date with the latest science in electrophysiology. The quality of the articles has been crucial to the success of the journal and this is a result of the hard work of the contributors and the skill and dedication of the editorial team, led by Dr Demosthenes…
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Author(s):
Jeffrey J Hsu
,
Ali Nsair
,
Jamil A Aboulhosn
,
et al
Added:
3 years ago
Monomorphic ventricular arrhythmias (MMVA) are not uncommon in athletes,1,2 yet their presence appropriately raises concern among practitioners for possible increased risk of sudden cardiac death (SCD) during sports activity and competition. While all MMVA detected in athletes warrant further evaluation,1 a majority of MMVA in this population are likely to be benign. In some instances of so…
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Author(s):
Megan Barber
,
Jason Chinitz
,
Roy John
Added:
3 years ago
Ventricular arrhythmias are designated idiopathic when demonstrable structural heart disease, significant coronary disease including coronary spasm or genetic arrhythmia syndromes are absent.1 These arrhythmias may be benign but are also a recognised cause of sudden cardiac death. The common form of idiopathic ventricular tachycardia (VT) originates in the ventricular outflow tracts, manifest…
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Author(s):
Ethan R Ellis
,
Mark E Josephson
Added:
3 years ago
Cardiomyopathies are heterogeneous heart muscle disorders with a wide range of aetiologies and clinical manifestations. They are often defined by their causes (i.e. hypertension, prior myocardial infarction, valvular heart disease), although current major society definitions describe cardiomyopathy as the presence of abnormal myocardial structure and/or function in the absence of underlying…
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Author(s):
Josef Kautzner
,
Petr Peichl
Added:
3 years ago
Ventricular fibrillation (VF) is a complex arrhythmia that leads invariably to cardiac arrest. Its mechanisms remain largely unclear. Similar to atrial fibrillation, the mother rotor hypothesis is one plausible alternative.1,2 In larger animals, some authors reported that the dominant frequency of VF could be recorded at a junction of the left ventricular posterior wall and the septum.3-6 Others…
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Author(s):
Jackson J Liang
,
Yasuhiro Shirai
,
Aung Lin
,
et al
Added:
3 years ago
Idiopathic ventricular arrhythmias (VAs) are comprised of ventricular premature depolarisations, non-sustained ventricular tachycardia (VT)and rarely sustained VT, and these typically occur in the absence of structural heart disease. In general, idiopathic VAs tend to have a benign prognosis, although a high burden of VAs can result in left ventricular (LV) systolic dysfunction and cardiomyopathy…
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Author(s):
Ryan Wallace
,
Hugh Calkins
Added:
2 years ago
Author(s):
Takumi Yamada
,
G Neal Kay
Added:
3 years ago
Idiopathic ventricular arrhythmias (IVAs) usually originate from the specific anatomical structures. For the past decade, major IVA origins from both endocardial and epicardial sites have been increasingly recognised (see Table 1).1–3 Catheter ablation of IVAs is usually safe and highly successful, but can sometimes be challenging because of the anatomical obstacles. Therefore, understanding the…
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