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Atrial pressure increase does not significantly affect sinus node automaticity.
2004 DEC 2 - (NewsRx.com & NewsRx.net) -- Researchers have investigated the effect of atrial pressure increase on sinus node automaticity
"There is evidence suggesting that atrial electrophysiological properties may be changed by an acute increase in atrial pressure. The aim of [our]study was to investigate the effect of alteration in atrial pressure on sinus node recovery time," scientists in Greece report.
M. Efremidis and colleagues of "Evangelismos" General Hospital in Athens described their study, "Twelve patients (8 men and 4 women, mean age 61.3[+ or -]14.1 years) were included in this study. None of the patients had organic heart disease. Sinus node recovery time (SNRT) was measured following atrial pacing and atrioventricular (AV) pacing at sequential cycle lengths of 600, 545, 500, 461, 428, and 400 ms with two different AV intervals (150, 0 ms)."
"Peak and minimal atrial pressure increased significantly from 8.5[+ or -]2.8 to 20.1[+ or -]2.9 mmHg (11.56[+ or -]3.8 to 27.3[+ or -]3.9 cmH[subscript]2O) (P=0.001) and from 2.06[+ or -]1.69 to 5.33[+ or -]2.9 mmHg (2.8[+ or -]2.29 to 7.2[+ or -]3.9 ...
- Elevated left atrial pressure causes rapid fluid accumulation.
- Newspaper article from: Cardiovascular Week February 3, 2003 700+ words
...Cardiogenic pulmonary edema is caused by the increase in left atrial pressure when the left heart fails. "However, over the following...Physiological Sciences ("Pulmonary edema and elevated left atrial pressure: Four hours and beyond," News Physiol Sci, 2002;17...
- Ventricular pacing or dual-chamber pacing for Sinus-Node Dysfunction.(Abstract)
- Magazine article from: Clinical Cardiology Alert August 1, 2002 700+ words
...Dual chamber pacing in patients with sinus node dysfunction does not improve the rate...RESULTS OF THE MODE Selection Trial in Sinus-Node Dysfunction (MOST). This study compared...patients with symptomatic bradycardia due to sinus node dysfunction. Patients were eligible...
- Atrial pressure monitors may revolutionize HF management.(Cardiovascular...
- Magazine article from: Family Practice News March 15, 2006 700+ words
...SNOWMASS, COLO. -- Implantable left atrial pressure sensors may provide a breakthrough...patients with a well-controlled left atrial pressure (LAP) of 16 mm Hg or less at hospital...predict outcomes. "Increased left atrial pressure is associated with increased acute...
- Acute thrombosis of the sinus node artery: arrhythmological implications....
- Magazine article from: Heart Ando, G. Gaspardone, A. Proietti, I. February 1, 2003 700+ words
...occlusion of the coronary side branch for the sinus node occurred, associated with intermittent...speculation about the potential mechanisms for sinus node dysfunction. Degenerative fibrosis of...patients with multiple risk factors. Thus, sinus node dysfunction may be an unrecognised ...
- Doppler Diastolic Dysfunction in the Elderly.
- Magazine article from: Clinical Cardiology Alert June 1, 2005 700+ words
...are not due to differences in left atrial pressure over the physiologic range of pressures...do not support increases in left atrial pressure in normal healthy elderly subjects...are not due to differences in left atrial pressure over the physiologic range of pressures...
- Severe pulmonary hypertension in a patient with hypertrophic cardiomyopathy:...
- Magazine article from: Heart Brilakis, E.S. Nishimura, R.A. July 1, 2003 700+ words
...hypertension secondary to elevation of left atrial pressure is common in patients with hypertrophic...between 5-50 mm Hg. The mean left atrial pressure was 20 mm Hg. The pulmonary artery...pulmonary artery pressure; LA, left atrial pressure). Alcohol septal ablation was performed...
- Doppler echo estimation of pulmonary artery pressure.(Brief Article)
- Magazine article from: Clinical Cardiology Alert February 1, 2002 700+ words
...tricuspid valve. The estimation of right atrial pressure to complete the estimate of PASP by...Others have proposed estimating right atrial pressure by observing the size and amount of...popular technique is to estimate right atrial pressure in increments of 5 mm Hg using the...
- Research letters.
- Magazine article from: British Journal of Sports Medicine June 1, 2003 700+ words
...hypothesis that it was the fall in right atrial pressure induced by blood loss that activated...limb thereby increasing the right atrial pressure, abolishing the reflex and normalising...reflex that is activated when the right atrial pressure either falls below some critical value...
- Cytokinetics, Inc. Investor Luncheon - Part 3.
- News wire article from: The America's Intelligence Wire September 13, 2006 700+ words
...they change. So the reason that left atrial pressure or pulmonary capillary [wedge] pressure...you see actually drops in the left atrial pressure, and so to me, like heart rate is...cardiac function is doing and left atrial pressure or pulmonary capillary wedge pressure...
- Clinical applications of tissue Doppler imaging: a promise...
- Magazine article from: Heart Marwick, T.H. December 1, 2003 700+ words
...is to obtain a ratio of the E wave (which is dependent on left atrial pressure) and the Ea velocity by tissue Doppler (which is relatively independent of left atrial pressure). If the resulting number is < 8, it is likely that left...
Source: HighBeam Research, Atrial pressure increase does not significantly affect sinus node...