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2015 ; 128
(7
): 969-75
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J wave syndromes: a decade of progress
#MMPMID25836620
Li GL
; Yang L
; Cui CC
; Sun CF
; Yan GX
Chin Med J (Engl)
2015[Apr]; 128
(7
): 969-75
PMID25836620
show ga
OBJECTIVE: The objective was to provide a brief history of J wave syndromes and
to summarize our current understanding of their molecular, ionic, cellular
mechanisms, and clinical features. We will also discuss the existing debates and
further direction in basic and clinical research for J wave syndromes. DATA
SOURCES: The publications on key words of "J wave syndromes", "early
repolarization syndrome (ERS)", "Brugada syndrome (BrS)" and "ST-segment
elevation myocardial infarction (STEMI)" were comprehensively reviewed through
search of the PubMed literatures without restriction on the publication date.
STUDY SELECTION: Original articles, reviews and other literatures concerning J
wave syndromes, ERS, BrS and STEMI were selected. RESULTS: J wave syndromes were
firstly defined by Yan et al. in a Chinese journal a decade ago, which represent
a spectrum of variable phenotypes characterized by appearance of prominent
electrocardiographic J wave including ERS, BrS and ventricular fibrillation (VF)
associated with hypothermia and acute STEMI. J wave syndromes can be inherited or
acquired and are mechanistically linked to amplification of the transient outward
current (I to )-mediated J waves that can lead to phase 2 reentry capable of
initiating VF. CONCLUSIONS: J wave syndromes are a group of newly highlighted
clinical entities that share similar molecular, ionic and cellular mechanism and
marked by amplified J wave on the electrocardiogram and a risk of VF. The
clinical challenge ahead is to identify the patients with J wave syndromes who
are at risk for sudden cardiac death and determine the alternative therapeutic
strategies to reduce mortality.