Abstract：
BACKGROUND:While J-waves were observed in healthy populations, variations in their reported incidence may be partly explicable by the ECG filter setting. METHODS:We obtained resting 12-lead ECG recordings in 665 consecutive patients and enrolled 112 (56 men, 56 women, mean age 59.3±16.1years) who manifested J-waves on ECGs acquired with a 150-Hz low-pass filter. We then studied the J-waves on individual ECGs to look for morphological changes when 25-, 35-, 75-, 100-, and 150Hz filters were used. RESULTS:The notching observed with the 150-Hz filter changed to slurring (42%) or was eliminated (28%) with the 25-Hz filter. Similarly, the slurring seen with the 150-Hz filter was eliminated on 71% of ECGs recorded with the 25-Hz filter. The amplitude of J-waves was significantly lower with 25- and 35-Hz than 75-, 100-, and 150-Hz filters (p<0.0001). CONCLUSIONS:The ECG filter setting significantly affects the J-wave morphology.
journal_name
J Electrocardioljournal_title
Journal of electrocardiologyauthors
Nakagawa M,Tsunemitsu C,Katoh S,Kamiyama Y,Sano N,Ezaki K,Miyazaki H,Teshima Y,Yufu K,Takahashi N,Saikawa Tdoi
10.1016/j.jelectrocard.2013.10.001subject
Has Abstractpub_date
2014-01-01 00:00:00pages
7-11issue
1eissn
0022-0736issn
1532-8430pii
S0022-0736(13)00549-9journal_volume
47pub_type
杂志文章abstract：:We present an example of sudden modification in QRS morphology during ventricular pacing inside a scar-related isthmus. This is explained by a "concealed" sudden block in both the orthodromic and antidromic wavefront directions, allowing then the activation to proceed through a now overt antidromic conduction. ...
journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
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abstract：:Successful curative treatment of right atrial tachycardia (AT) can be obtained provided detailed catheter activation mapping of the target site for radiofrequency energy application has been accomplished. However, right AT mapping may be difficult with a single roving catheter due to infrequent presence or noninducibi...
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journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
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doi：10.1016/s0022-0736(98)90009-7
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journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
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doi：10.1016/0022-0736(90)90073-b
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abstract：BACKGROUND:Elevated levels of N-terminal pro brain natriuretic peptide (NT-proBNP) are associated with adverse cardiovascular outcome after ST elevation myocardial infarction (STEMI). We hypothesized that decreasing acuteness-score (based on the electrocardiographic score by Anderson-Wilkins acuteness score of myocardi...
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/s0022-0736(82)80033-2
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2003.10.003
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
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journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2020.08.002
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
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journal_title：Journal of electrocardiology
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journal_title：Journal of electrocardiology
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doi：
更新日期：1993-01-01 00:00:00
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journal_title：Journal of electrocardiology
pub_type： 杂志文章
doi：10.1016/j.jelectrocard.2015.04.001
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abstract：:The vectorcardiographic basis of indeterminate QRS axis has not been elucidated. Accordingly, Frank lead VCGs were obtained on ten consecutive subjects with biphasic QRS complexes in the six extremity leads. The frontal plane vector in each case showed a very narrow loop inscribed in a symmetrical fashion around the E...
journal_title：Journal of electrocardiology
pub_type： 杂志文章
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