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Biomedical subjects

J M Eckerd

Publications and source records attributed to J M Eckerd.

6 recordsLinked to original sources
PubMed1998

Long-term memory monitoring in infant tachycardias.

Evaluation and detection of pathological tachycardias in infants sometimes is difficult. Noninvasive recording of the infant's ECG at the time of symptoms forms the mainstay of diagnosis, although invasive electrophysiological testing may be required. Accurate rhythm diagnosis is central to successful treatment. The advent of high capacity ambulatory memory monitoring makes it possible to record ECG signals, as well as apnea data. We present two cases of infant tachycardia studied by memory monitor. These devices yield good quality ECG signals and may provide information regarding a particular rhythm disturbance.

Electrocardiography, Ambulatory↗
PubMed1989

Recent increase in incidence of acute rheumatic fever in southern West Virginia.

Rheumatic fever appeared to decline in the United States in the 1970s and early 1980s. In the last two years, however, there have been multiple reports of the resurgence of rheumatic fever. Two of these reports originated in states that border West Virginia. This study demonstrates that there has been a similar outbreak in the southern part of West Virginia in 1988. In addition, it appears that the incidence of first-attack heart damage is high, and that physicians should maintain their vigilance in diagnosing and treating acute rheumatic fever.

Acute Disease↗
PubMed1986

Factors affecting use of the Doppler-determined time from flow onset to maximal pulmonary artery velocity for measurement of pulmonary artery pressure in children.

Measurement of the time from onset to maximal or peak velocity (TPV) of pulmonary artery (PA) flow has been proposed as a noninvasive means of determining PA pressure. The effects of age, heart rate, increased PA pressure and flow, pulmonary valve obstruction and altered PA vascular resistance on this measurement were evaluated. In 84 children, aged 1 day to 18 years, TPV was measured using continuous-wave Doppler echocardiography. The children were separated into 3 groups. Group I (n = 33) consisted of children with no cardiovascular abnormalities. Group II (n = 33) consisted of children with a variety of cardiovascular diseases producing varying PA pressures and flows. Group III (n = 18) consisted of children who had valvular pulmonic stenosis with PA to right ventricular gradients greater than 40 mm Hg. Doppler studies of group II and III patients were performed in conjunction with measurement of PA pressures and flows at the time of cardiac catheterization. In group I TPV showed a significant negative linear correlation with heart rate (r = -0.86, p less than 0.001). The ratio of observed TPV to predicted TPV (TPVN) determined using the regression equation for TPV vs heart rate or TPV/TPVN was heart rate- and age-independent (p greater than 0.1) and ranged from 0.81 to 1.31 (mean 1.005). In group II TPV/TPVN was inversely related to the natural log of the PA pressures (systolic, r = -0.91; mean, r = -0.87; diastolic, r = -0.82; all p less than 0.01), whether pressure elevation was due to increased flow, resistance or left atrial hypertension.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗