The Ultrasound Cardiogram of the Tricuspid Valve in Healthy Subjects

概要

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It has been difficult to obtain satisfactory records of the tricuspid ultrasound curve in healthy subjects, possibly because of some anatomical reasons. In the present study, attempts were made to overcome the above difficulties and to obtain satisfactory records of the tricuspid ultrasound curve in healthy subjects.1. To study the tricuspid ultrasound curve in healthy subjects, a special equipment was devised.2. The tricuspid ultrasound curve was recorded with this equipment in about half the healthy subjects examined.3. In detecting the tricuspid valve the ultrasound beam should be sent into the chest medially 20°-40° from anterior-posteriorly through the vicinity of the left sternal edge in the third and/or fourth intercostal space.4. The normal ultrasound curve of the tricuspid valve shows a 2-peaked configuration in a cardiac cycle as that of the mitral anterior cusp. The structure detected is concluded to be the anterior cusp on the basis of the direction of motion.5. The amplitude of the normal tricuspid ultrasound curve and the "speed" calculated from the curve are similar to those of the mitral valve.6. The "speed" of diastolic descent of the tricuspid ultrasound curve was 163mm./sec. or more in 20 cases measured in the present study.
International Heart Journal刊行会の論文