Document Detail

Effect of dipping status on QRS morphology in patients with hypertension.
MedLine Citation:
PMID:  20559141     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Prolongation of the QRS complex on the surface electrocardiogram (ECG) has been shown to be predictive of cardiovascular outcomes in selected populations. A 'nondipper' blood pressure (BP) profile is currently regarded as a risk factor in its own right for cardiovascular events and target organ damage. The predictive value of ECG parameters in hypertensives with nondipper profile has not been established.
METHODS: A total of 750 consecutive patients with hypertension who had been evaluated with ambulatory BP monitoring were screened for this study. One hundred and thirty-six patients who had fulfilled the inclusion and exclusion criteria were included in the final analysis. Dipper and nondipper patterns were detected and the maximum QRS duration (QRSd) measured on a 12-lead ECG was recorded.
RESULTS: There were 70 nondipper and 66 dipper hypertensives. There was no significant difference between the two groups regarding the daytime systolic and diastolic mean BPs, number of medications taken, and the proportion of each class of antihypertensive medications. Other variables were similar between the two groups. QRSd was significantly higher in nondippers than dippers (P=0.006). Correlation analysis revealed that the systolic BP fall at night was inversely and significantly related with QRSd (r=-0.482, P<0.001). Regression analysis further showed that the systolic BP fall at night and age were independent correlates of QRSd.
CONCLUSION: QRSd on the standard-surface 12-lead ECG was increased in patients with nondipper pattern and furthermore the systolic BP fall at night was independent correlate of QRSd in patients with hypertension.
Ismail Erden; Emine Cakcak Erden; Hakan Ozhan; Subhan Yalçin; Cengiz Basar; Mesut Aydin
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Blood pressure monitoring     Volume:  15     ISSN:  1473-5725     ISO Abbreviation:  Blood Press Monit     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-17     Completed Date:  2011-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9606438     Medline TA:  Blood Press Monit     Country:  England    
Other Details:
Languages:  eng     Pagination:  247-50     Citation Subset:  IM    
Department of Cardiology, Duzce University, Düzce Medical School, Konuralp, Duzce, Turkey.
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MeSH Terms
Blood Pressure Monitoring, Ambulatory
Circadian Rhythm / physiology
Hypertension / physiopathology*
Middle Aged

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