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Biomedical subjects

W Pearl

Publications and source records attributed to W Pearl.

At least 37 records · Page 2Linked to original sources
PubMed1990

Self-entwinement of an active fixation pacemaker electrode.

We report a case in which an active fixation atrial lead tip became entwined on the proximal lead body during implantation. It was not possible to disengage the tip or to remove the resultant lead loop atraumatically through the insertion site. Removal of the lead was accomplished using a Dotter intravascular snare inserted via a femoral vein, with subsequent successful implantation of a new lead. This unusual technique-related complication emphasizes the need for meticulous fluoroscopic visualization during lead manipulation.

Aged↗
PubMed1989

Sexual maturity rating: a marker for effects of pubertal maturation on the adolescent electrocardiogram.

The heart is known to participate in the adolescent growth spurt. A peak increase in transverse diameter coincides with peak height velocity during pubertal maturation. The effects of maturation on the adolescent ECG were explored using sexual maturity rating (SMR) as a marker. ECGs were obtained from 751 patients 8 to 20 years of age seen for routine physical examinations. A total of 33 standard ECG measures were analyzed, with subjects separated by sex and SMR. Different trends were seen in boys and girls during the course of maturation for the majority of R and S wave amplitude measurements. Lower mean amplitudes were seen consistently in more mature (SMR 4 and 5) girls than less mature girls and all boys. The clinical implication of these findings is illustrated by analysis of the sum of RV5 and SV2, one of the criteria for left ventricular hypertrophy, by sex and SMR. No significant difference in the sum is noted for boys across five SMR groups. Girls, in contrast, show a steady decrease in the sum with advancing maturation. These trends are not as clearly shown when subjects are grouped by broad chronologic age ranges, as had been the practice in developing current adolescent ECG tables. These findings suggest that development of standard ECG tables in which SMR and sex have been taken into account might enhance interpretation during adolescence.

Adolescent↗
PubMed1988

Stokes-Adams attacks in congenital complete heart block.

Stokes-Adams attacks are a well-known complication of congenital complete heart block. Although they are generally felt to be precipitated by either bradycardia or tachycardia, this is poorly documented. A case is presented in which a 23 month old with congenital complete heart block and an intermittently prolonged QT interval had a Stokes-Adams attack during a spontaneous episode of ventricular tachycardia. The combination of congenital complete heart block and a prolonged QT interval carries a significant risk of ventricular tachycardia.

Adams-Stokes Syndrome↗
PubMed1988

The relationship between sexual maturity rating, age, and increased blood pressure in adolescents.

Blood pressure values are known to vary with age and body size. The effect of sexual maturity was explored in 746 patients in an adolescent clinic. Systolic blood pressure for boys and girls showed an increase with a change from Tanner stage 2 to 3. Diastolic blood pressure did not increase. Both systolic and diastolic blood pressures showed a weight effect that was generally maintained within the Tanner stages. The gradual increase in blood pressure for large groups of adolescents would appear to be the result of the aggregate increase in size (weight) resulting from the asynchronous growth spurts of individuals studied. Consequently, those individuals with a strikingly early or late onset of maturation may have erroneous interpretations of their blood pressure. As biologic outliers, the borderline hypertensive who matures early may be overidentified, while the late maturer might go unrecognized.

Adolescent↗
PubMed1987

Scimitar variant.

In the classic scimitar syndrome, a pulmonary vein draining all or part of the right lung enters the inferior vena cava. A variant is described with the same roentgenographic appearance, but with drainage of the anomalous pulmonary vein into both the inferior vena cava and the left atrium; the atrial septum was intact. This case, together with six others reported elsewhere, reminds us that the scimitar sign has both false positives and false negatives. Therefore, the diagnosis of scimitar syndrome cannot be made with certainty from a plain x-ray film.

Adolescent↗
PubMed1984

Acardia: case report.

Explore the source record for details and available documents.

Abnormalities, Severe Teratoid↗
PubMed1982

Congenital heart disease in the Pierre Robin syndrome.

Congenital heart disease occurs in about 20 percent of patients with Pierre Robin syndrome. Ventricular septal defect, patent ductus arteriosus, and atrial septal defect are the most common congenital cardiac lesions in this syndrome. The associated upper airway obstruction can produce cor pulmonale, cardiomegaly, pulmonary edema, and cyanosis.

Electrocardiography↗
PubMed1981

Ehlers-Danlos syndrome.

We have described a patient with type 4 Ehlers-Danlos syndrome who died of a ruptured pulmonary artery. Of the six subtypes of Ehlers-Danlos syndrome, which can usually be clinically differentiated, only types 1 and 4 appear to be associated with a substantial risk of arterial rupture.

Adult↗
PubMed1977

Cardiac malformations presenting as congenital atrial flutter.

A case of congenital atrial flutter with tetralogy of Fallot is presented. Fetal tachycardia was detected three weeks prior to birth and digitalization converted the arrhythmia to a normal sinus rhythm at two days of age. The seven previously reported cases of congenital atrial flutter associated with congenitally malformed hearts are reviewed.

Atrial Flutter↗