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[Hemodynamic effects of right ventricular outflow pacing]
T Ishikawa1, S Sumita, M Kikuchi
1Second Department of Internal Medicine, Urafune Hospital, Yokohama City University School of Medicine.
Journal of Cardiology
|October 6, 1997
Summary
Right ventricular outflow pacing improved cardiac output and reduced pulmonary capillary wedge pressure compared to right ventricular apex pacing. This enhancement in cardiac function was observed across different pacing modes and patient ejection fractions.
Area of Science:
- Cardiology
- Biomedical Engineering
- Electrophysiology
Context:
- Right ventricular apex pacing is a common method for cardiac pacing.
- Optimal lead placement is crucial for pacemaker efficacy.
- Previous studies suggest potential hemodynamic differences between pacing sites.
Purpose:
- To investigate the hemodynamic effects of right ventricular outflow tract pacing compared to right ventricular apex pacing.
- To evaluate changes in cardiac output and pulmonary capillary wedge pressure.
- To assess the impact of pacing site on cardiac function across different pacing modes and ejection fractions.
Summary:
- This study evaluated 13 patients with pacemakers, comparing right ventricular outflow tract pacing to right ventricular apex pacing.
- Hemodynamic parameters, including cardiac output and pulmonary capillary wedge pressure, were measured.
- Right ventricular outflow tract pacing demonstrated significant improvements in cardiac output and reductions in pulmonary capillary wedge pressure.
Impact:
- Right ventricular outflow tract pacing offers a superior hemodynamic profile compared to right ventricular apex pacing.
- These findings suggest a potential optimization strategy for pacemaker implantation to improve cardiac performance.
- The benefits were consistent across various pacing modes and patient cardiac reserve levels.