Journal article
Cardiogenic motion of right lung parenchyma in anesthetized intact dogs
Journal of applied physiology (1985), Vol.58(2), pp.384-391
1985
DOI: 10.1152/jappl.1985.58.2.384
PMID: 3980346
Abstract
Cardiogenic motion of the right lung parenchyma (CGLM) was measured in six morphine-pentobarbital-anesthetized dogs (11-16 kg) under conditions of varying paced and spontaneous sinus heart rates. Motion of 1-mm-diameter percutaneously implanted radiopaque lung parenchymal markers were measured using a computer-based biplane video-roentgenographic assembly. Correlation of the amplitudes and phases of marker motions to the R wave of the electrocardiogram (ECG) were determined utilizing a modified fast Fourier transform algorithm. Of initial importance was the observation that CGLM was significantly greater than the variability of repeated measurements. The total amplitudes of motion of the markers (where A(t) = √(A(x)2 + A(y)2 + A(z)2) and A(x), A(y), A(z) are the amplitudes of marker motion along the orthogonal X, Y, and Z body axes) in the right apical, cardiac, and diaphragmatic lobes were 0.025 ± 0.005 (SE), 0.046 ± 0.005, and 0.023 ± 0.025 cm, respectively, (P < 0.01, cardiac lobe vs. others). The total amplitude of motion observed in the cardiac lobe was equivalent to earlier observations of total amplitude (0.045 ± 0.004 cm) of marker motion in response to high frequency airway oscillation at a pump stroke volume of 22-26 ml. An analysis of the higher harmonics of marker oscillation suggested that the second harmonic of CGLM is also larger than the variability of our measurements.
Details
- Title: Subtitle
- Cardiogenic motion of right lung parenchyma in anesthetized intact dogs
- Creators
- J. H Wei - Mayo ClinicE. A Hoffman - Mayo ClinicE. L Ritman - Physiology & Biomedical EngineeringE. H Wood - Mayo Clinic College of Medicine and Science
- Resource Type
- Journal article
- Publication Details
- Journal of applied physiology (1985), Vol.58(2), pp.384-391
- Publisher
- American Physiological Society
- DOI
- 10.1152/jappl.1985.58.2.384
- PMID
- 3980346
- ISSN
- 8750-7587
- eISSN
- 1522-1601
- Language
- English
- Date published
- 1985
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering; Radiology; Internal Medicine
- Record Identifier
- 9984318709002771
Metrics
22 Record Views