[abstract] MEASUREMENT OF CARDIAC OUTPUT DURING A 320 MSW SATURATION DIVE COMPARISON BETWEEN C2H2 REBREATHING METHOD AND M MODE ULTRASONIC ECHOCARDIOGRAM.

Rubicon Research Repository/Manakin Repository

[abstract] MEASUREMENT OF CARDIAC OUTPUT DURING A 320 MSW SATURATION DIVE COMPARISON BETWEEN C2H2 REBREATHING METHOD AND M MODE ULTRASONIC ECHOCARDIOGRAM.

Show full item record


Title: [abstract] MEASUREMENT OF CARDIAC OUTPUT DURING A 320 MSW SATURATION DIVE COMPARISON BETWEEN C2H2 REBREATHING METHOD AND M MODE ULTRASONIC ECHOCARDIOGRAM.
Author: Okamoto, Y; Nitahara, K; Hashimoto, A; Ikeda, T
Abstract: When we conducted a 320 msw saturation dive in 1988, we measured 6 divers' cardiac output (CO) by both C2H2 rebreathing method and M mode ultrasonic echocardiogram (M mode UCG) at rest in the supine position. Measurement was carried out while being at the bottom, at 220 and 123 msw during decompression, and after surfacing. CO obtained by two methods tended to be greater at the bottom than both at the surface and during decompression with no statistical significance. Ejection fraction and mean velocity of circumference shortening (mVcf) also tended to be greater at the bottom than in other depths. CO measured by C2H2 rebreathing method and M mode UCG had a good correlation except for a few cases. These poorly correlated cases were caused by the inappropriate pointing of an echo probe and/or mechanical limitation of the single probe M mode method. In conclusions, 1) we could observe the tendency of the increased CO at the depth of 320 msw, and 2) although there are technical and/or methodological limitations, the M mode UCG was a useful non-invasive method to analyze the cardiac function under hyperbaric environment.
Description: Abstract of the Undersea and Hyperbaric Medical Society, Inc. Annual Scientific Meeting held 6-11 June 1989. Hawaiian Regent Hotel, Honolulu, Hawaii, USA (http://www.uhms.org)
URI: http://archive.rubicon-foundation.org/6720
Date: 1989

Files in this item

Files Size Format View
abstract.txt 193bytes Text file View/Open

This item appears in the following Collection(s)

  • UHMS Meeting Abstracts
    This is a collection of the published abstracts from the Undersea and Hyperbaric Medical Society (UHMS) annual meetings.

Show full item record

Browse

My Account