Clinical significance of pulmonary arterial input impedance

Clinical significance of pulmonary arterial input impedance.

C Cl li in ni ic ca al l s si ig gn ni if fi ic ca an nc ce e o of f p pu ul lm mo on na ar ry y a ar rt te er ri ia al l i in np pu ut t i im mp pe ed da an nc ce e Pulmonary arterial input impedance excites the attention of few clinicians, but there are compelling reasons why they should be more interested in this subject. Physicians are well-versed in the intricacies of pulmonary vascular re...

Input impedance of the pulmonary arterial system in normal man. Effects of respiration and comparison to systemic impedance.

Input impedance of the pulmonary arterial system was determined in 10 subjects undergoing elective cardiac catheterization. No cardiovascular or pulmonary disease was found in these patients. In five of the subjects, systemic arterial impedance was also obtained, so that both systems could be compared. Pulmonary and systemic peripheral resistances were 79 +/- 9 dynes sec/cm5 (mean +/- SEM) and ...

Modulation of pulmonary arterial input impedance during transition from inspiration to expiration.

We investigated whether respiration influences pulmonary arterial input impedance during transition from inspiration to expiration in five anesthetized, spontaneously breathing dogs. Impedance (Z) was separately assessed for heart beats occurring in inspiration, in expiration, and during the transition from inspiration to expiration (transitional beat). Transitional beats were scored by the rat...

Is pulmonary arterial impedance affected by breathing?

Feasibility of routine pulmonary arterial impedance measurements in pulmonary hypertension.

OBJECTIVES Right ventricular (RV) afterload is best described by a pulmonary arterial impedance (PVZ) spectrum, which integrates pulmonary vascular resistance (PVR), elastance, and wave reflection. We evaluated the feasibility of PVZ determinations in patients with pulmonary arterial hypertension (PAH) during routine right heart catheterization and Doppler echocardiography. DESIGN Prospective...