Document Detail

Post-ventricular tachycardia P wave change simulating atrial enlargement.
MedLine Citation:
PMID:  9533381     Owner:  NLM     Status:  MEDLINE    
An abnormal P wave was observed in a child affected by prolonged idiopathic ventricular tachycardia (fascicular tachycardia). After sinus rhythm restoration, the P wave was very tall and peaked (0.5 mV in lead II), suggesting a diagnosis of atrial enlargement. No cardiac abnormality, however, was detected by clinical and echocardiographic examination. The P wave abnormality lasted for about 1 month, with progressive voltage and shape normalization. These P wave changes were probably dependent on tachycardia; since the arrhythmia was long-lasting and characterized by atrioventricular dissociation, repetitive atrial contraction against closed atrioventricular valves caused stretching of atrial fibers, resulting in P wave abnormality. This observation suggests that very prolonged ventricular tachycardia may be associated with an electrocardiographic pattern of pseudoatrial enlargement.
M P Calabrò; G Oreto; S Consolo
Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Journal of electrocardiology     Volume:  31     ISSN:  0022-0736     ISO Abbreviation:  J Electrocardiol     Publication Date:  1998 Jan 
Date Detail:
Created Date:  1998-05-18     Completed Date:  1998-05-18     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0153605     Medline TA:  J Electrocardiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  67-70     Citation Subset:  IM    
Department of Pediatrics, Cardiology Service, University of Messina, Italy.
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MeSH Terms
Bundle-Branch Block / diagnosis*,  physiopathology,  ultrasonography
Cardiomegaly / diagnosis*
Diagnosis, Differential
Heart Atria / physiopathology

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