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Biomedical subjects

S M Moore

Publications and source records attributed to S M Moore.

3 recordsLinked to original sources

Hypertension in valvar aortic stenosis.

The indirect arterial blood pressure in 50 cases of catheter-proven aortic stenosis without significant incompetence was examined. Defining the upper limit of normal blood pressure as 140/90mmHg, 14 percent had borderline, 18 percent had mild and 8 percent had severe hypertension. There was a significant positive correlation of systolic and diastolic blood pressure with age; ie pressures rose with age. The rate of increase was virtually identical with that of the normal population except for those over 70. Hypertension interferes with reliable clinical and haemodynamic quantitation of the valve lesion. The two lesions summate to increase the systolic burden on left ventricle.

Adolescent

A five-year study of mortality in a busy ski population.

A 5-year study of a busy ski population in Utah revealed a total at-risk period of approximately 3.5 million skier-days. While the morbidity (fractures, strains, sprains, and occasionally more severe injuries) associated with skiing is well recognized and considered by most physicians concerned to be distributed somewhat unevenly within the various skills of skiing, the authors have identified an exceedingly low mortality among the same population. Six individuals died as a result of injuries directly attributable to skiing. Three of these were considered to be advanced skiers and three were of intermediate skill. In three instances the environment was considered to play a role in the accident. Two of these victims were skiing out of control, one as a result of ice-covered snow and one as a result of speed in combination with a small jump. The third victim was crushed in an avalanche. One accident was completely unexplained, the skier having skied without apparent attempt at checking or change of course into a nonrecreational area. The two remaining skiers of intermediate skill both suffered injuries incident to falling forward with considerable force onto a relatively flat, hard snow surface. Notwithstanding the intense and sometimes prolonged exertion at relatively high altitudes (9,400 to 11,000 ft or 2.9 to 3.3 km), only one skier with a previous history of atherosclerotic heart disease died while skiing. One additional middle-aged skier with similar history died at the conclusion of the day.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent

A detection algorithm for multiform premature ventricular contractions.

This paper reports an algorithm developed to identify and quantify multiform PVCs. The algorithm clusters PVCs of similar morphology using a combination of time-domain and frequency-domain analysis. Initially, PVCs are grouped together on the basis of four time-domain-based morphological feature measurements. However, these time-domain-based clusters many times are nonunique because commonly encountered signal changes can cause substantial variations in the feature measurements of clinically similar beats. These redundant clusters are consolidated using two frequency-domain parameters: The First Spectral Moment (FSM) (center of gravity) of the amplitude spectrum, and the 5-Hz phase angle.

Cardiac Complexes, Premature