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Biomedical subjects

H J Marriott

Publications and source records attributed to H J Marriott.

At least 55 records · Page 3Linked to original sources
PubMed1968

Disturbances in atrial rhythm and conduction following the surgical creation of an atrial septal defect by the Blalock-Hanlon technique.

Disturbances in atrial conduction or rhythm, or both, were found in 16 of 27 patients undergoing the surgical creation of an atrial septal defect by the Blalock-Hanlon technique. These included P-wave aberrations of intra-atrial block and ectopic atrial rhythm, A-V rhythm, A-V dissociation, sinus bradycardia, atrial flutter, escape-capture bigeminy, and atrial premature beats. Some of these were transient and occurred within 2 weeks after surgery. It seems likely that tissue trauma engendered by the clamp and resection of the atrial septum with possible injury to the internodal conducting pathways may be the genesis of these early postoperative disturbances. Of the eight cases with transient disturbances, six occurred in this period. Later changes, such as intra-atrial block, sinus bradycardia, and atrial flutter, may be attributed to changes in atrial size secondary to the postoperative pathophysiology. Digitalis intoxication and congestive heart failure cannot be excluded as contributory factors in either the early or the late disturbances. It was not possible to correlate the incidence and nature of these disturbances with morbidity and mortality. In such severely ill, cyanotic infants, irregularities, however slight, may have altered cardiac function significantly and contributed to their deaths.

Bradycardia↗
PubMedDate not supplied

Ventricular tachycardia: noninvasive differentiation from supraventricular tachycardia.

The paramount importance of differentiating the wide-QRS tachycardias is stressed, and the alarming frequency of errors made by practicing physicians and cardiovascular nurses is documented. The most common causes of error are outlined, of which the most important is ignorance of diagnostically helpful QRS morphology in the electrocardiogram (EKG). The QRS contours and polarity that are useful in diagnosis are described in detail and illustrated. Finally, certain compromises in electrode placement that may be necessary in the operating room are suggested.

Diagnosis, Differential↗
PubMedDate not supplied

Ventricular tachycardia, diagnosis and misdiagnosis: a case report.

We report a patient who, despite significant cardiac disease and inappropriate therapy, endured continuous undiagnosed ventricular tachycardia (VT) for 5 days without hemodynamic deterioration. The two main reasons for the frequently missed diagnosis of VT are (1) the mistaken belief that VT cannot be well tolerated, and (2) ignorance of the many helpful electrocardiographic clues. Six precepts for avoiding misdiagnosis are enunciated.

Aged↗