Cardiology Medical News about sinus node disease, paroxysmal atrial fibrillation, atrial contraction velocity, interatrial synchronicity, intraatrial synchronicity, tissue Doppler imaging

Become a Member Today!
Register

Most Viewed Abstracts

1. Report Shows Shift in Starting Salaries for Physicians

2. Pre-participation screening of young competitive athletes for prevention of sudden cardiac death

3. The Job Market for 2008-2009: Compensation

4. Renal Artery Stenosis

5. AHA Guidelines on Cardiac CT for Assessing Coronary Artery Disease

Your Article Summary

See Latest Articles

(Click the title below to leave the MDLinx Network and go to the Journal's Website)

Interatrial mechanical dyssynchrony worsened atrial mechanical function in sinus node disease with or without paroxysmal atrial fibrillation
Journal of Cardiovascular Electrophysiology, 07/17/09

Wang M et al. – Sinus node disease (SND) pts with paroxysmal atrial fibrillation (AF) had reduced regional and global active midleft atrial (LA) mechanical contraction and increased interatrial dyssychrony vs pts without AF. These findings suggest that abnormal atrial electromechanical properties are associated with AF in SND pts.

Methods

Study of prevalence and impact of atrial mechanical dyssynchrony on atrial function in SND pts with/without paroxysmal AF
Echocardiographic examination with tissue Doppler imaging in 30 SND pts with (11) or without (19) paroxysmal AF who received dual-chamber pacemakers
Tissue Doppler indexes: atrial contraction velocities (Va) and timing events (Ta) measured at LA and right atrial (RA) wall
Intraatrial synchronicity defined by standard deviation and maximum time delay of Ta among 6 segments of LA (septal/lateral/inferior/anterior/posterior/anterospetal)
Interatrial synchronicity defined by time delay between Ta from RA and LA free wall

Results

No differences in age, P-wave duration, left ventricular ejection fraction, LA volume, and ejection fraction between with/without AF
Pts with paroxysmal AF had lower mitral inflow A velocity, LA active empting fraction, mean Va of LA, and greater interatrial synchronicity vs pts without AF
Lower mitral inflow A velocity and prolonged interatrial dyssynchrony: independent predictors for presence of AF in SND pts

<< Previous
Incremental prognostic value of gated Rb-82 positron emission...

Next >>
The relationship between endocardial voltage and regional volume...