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Effects of positional changes on inferior vena caval size and dynamics and correlations with right-sided cardiac pressure.
Am J Cardiol. 1987 Jan 01; 59(1):125-32.AJ

Abstract

Effects of supine and lateral positions on the size and shape of the inferior vena cava (IVC) were studied in 30 normal persons and in 53 patients with cardiac disease undergoing right-sided cardiac catheterization. In normal subjects, mean values for both IVC diameter and area decreased significantly (p less than 0.01) from the right lateral (22 +/- 3 mm and 3.9 +/- 0.6 cm2, respectively) to the supine position (15 +/- 5 mm; 1.8 +/- 0.9 cm2) to the left lateral position (7 +/- 3 mm; 0.8 +/- 0.4 cm2). IVC shape was round in the right lateral, oval in the supine, and slit-like in left lateral position. In the 53 patients, significant differences in IVC diameter and area were also detected in all 3 positions. However, when separated into 2 groups according to right atrial pressure, patients with normal pressure (8 mm Hg or less) had diameter and area values equivalent to those of normal subjects, whereas patients with elevated right atrial pressure (more than 8 mm Hg) had supine and left lateral IVC diameters and areas that were larger than normal, and approximately equivalent: diameters--23 +/- 3 mm (right), 18 +/- 5 mm (supine) and 17 +/- 7 mm (left); areas--4.1 +/- 0.8 cm2 (right), 3.3 +/- 1.2 cm2 (supine) and 3.1 +/- 1.3 cm2 (left). IVC diameters and areas in all 3 positions correlated with mean right atrial pressure, measured subsequently in the supine position, but the left lateral position provided the strongest correlations (r = 0.85, IVC diameter vs right atrial pressure; r = 0.89, IVC area vs right atrial pressure).(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, P.H.S.

Language

eng

PubMed ID

3812222

Citation

Nakao, S, et al. "Effects of Positional Changes On Inferior Vena Caval Size and Dynamics and Correlations With Right-sided Cardiac Pressure." The American Journal of Cardiology, vol. 59, no. 1, 1987, pp. 125-32.
Nakao S, Come PC, McKay RG, et al. Effects of positional changes on inferior vena caval size and dynamics and correlations with right-sided cardiac pressure. Am J Cardiol. 1987;59(1):125-32.
Nakao, S., Come, P. C., McKay, R. G., & Ransil, B. J. (1987). Effects of positional changes on inferior vena caval size and dynamics and correlations with right-sided cardiac pressure. The American Journal of Cardiology, 59(1), 125-32.
Nakao S, et al. Effects of Positional Changes On Inferior Vena Caval Size and Dynamics and Correlations With Right-sided Cardiac Pressure. Am J Cardiol. 1987 Jan 1;59(1):125-32. PubMed PMID: 3812222.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effects of positional changes on inferior vena caval size and dynamics and correlations with right-sided cardiac pressure. AU - Nakao,S, AU - Come,P C, AU - McKay,R G, AU - Ransil,B J, PY - 1987/1/1/pubmed PY - 1987/1/1/medline PY - 1987/1/1/entrez SP - 125 EP - 32 JF - The American journal of cardiology JO - Am J Cardiol VL - 59 IS - 1 N2 - Effects of supine and lateral positions on the size and shape of the inferior vena cava (IVC) were studied in 30 normal persons and in 53 patients with cardiac disease undergoing right-sided cardiac catheterization. In normal subjects, mean values for both IVC diameter and area decreased significantly (p less than 0.01) from the right lateral (22 +/- 3 mm and 3.9 +/- 0.6 cm2, respectively) to the supine position (15 +/- 5 mm; 1.8 +/- 0.9 cm2) to the left lateral position (7 +/- 3 mm; 0.8 +/- 0.4 cm2). IVC shape was round in the right lateral, oval in the supine, and slit-like in left lateral position. In the 53 patients, significant differences in IVC diameter and area were also detected in all 3 positions. However, when separated into 2 groups according to right atrial pressure, patients with normal pressure (8 mm Hg or less) had diameter and area values equivalent to those of normal subjects, whereas patients with elevated right atrial pressure (more than 8 mm Hg) had supine and left lateral IVC diameters and areas that were larger than normal, and approximately equivalent: diameters--23 +/- 3 mm (right), 18 +/- 5 mm (supine) and 17 +/- 7 mm (left); areas--4.1 +/- 0.8 cm2 (right), 3.3 +/- 1.2 cm2 (supine) and 3.1 +/- 1.3 cm2 (left). IVC diameters and areas in all 3 positions correlated with mean right atrial pressure, measured subsequently in the supine position, but the left lateral position provided the strongest correlations (r = 0.85, IVC diameter vs right atrial pressure; r = 0.89, IVC area vs right atrial pressure).(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0002-9149 UR - https://www.unboundmedicine.com/medline/citation/3812222/Effects_of_positional_changes_on_inferior_vena_caval_size_and_dynamics_and_correlations_with_right_sided_cardiac_pressure_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0002-9149(87)80084-X DB - PRIME DP - Unbound Medicine ER -