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Biomedical subjects

R L Popp

Publications and source records attributed to R L Popp.

At least 199 records · Page 11Linked to original sources
PubMed1975

Report of the inter-Society Commission for Heart Disease Resources. Optimal resources for ultrasonic examination of the heart.

The echocardiographic examination is described and the current status of ultrasound in cardiac diagnosis is summarized. Planning guidelines are provided for hospital based echocardiography laboratories including resource criteria for professional personnel and training, equipment, space, and support systems. Minimal case loads for maintaining quality performance of the examiner are recommended and various administrative patterns for organizing an echocardiography service are discussed. Approaches for establishing professional fees and emerging applications of diagnostic ultrasound in cardiovascular medicine are briefly reviewed. There is a description of the procedure for conducting an adequate echocardiographic examination in children and adults.

Adult↗
PubMed1975

Diagnostic accuracy of an ultrasonic multiple transducer cardiac imaging system.

Eighty patients with various forms of heart disease were studied with the use of a newly developed ultrasonic system having 20 transducers arranged in a linear array. This system allows visualization of the heart in two dimensions in real time. All 15 patients with the mitral valve prolapse syndrome, 13 patients with mitral stenosis, five patients with pericardial effusion, four patients with atrial septal defect, and one patient with left ventricular dyssynergy were properly recognized with this system. One of five patients with hypertrophic myopathy and one of four patients with congestive myopathy were not recognized with this system. Criteria for the recognition of these system. Criteria for the recognition of these conditions are presented as well as the probable cause for false-positive and false-negative diagnoses in this series. Since only qualitative criteria were used, it was not possible to differentiate patients with coronary artery disease or patients with left ventricular volume overload from patients without cardiac pathology. The accuracy of this new system was judged against the clinical examination, conventional echocardiography, cardiac catheterization, and left ventricular angiography. It is assumed that the criteria for diagnosis developed during this study will be supplemented and the equipment improved in the future; however, the ease of operation of this system and the relative accuracy of diagnosis at this stage of its development are extremely interesting. It presents an excellent opportunity to obtain additional information about the cardiac patient without using invasive procedures and without risk.

Cardiomegaly↗
PubMed1975

Echocardiographic findings in Uhl's anomaly. Demonstration of diastolic pulmonary valve opening.

The echocardiographic findings in a case of Uhl's anomaly, or congenital hypoplasia of the right ventricular myocardium, are reported. Diastolic opening of the pulmonary valve is described. Comparison is made with echocardiograms in Ebstein's disease of the tricuspid valve, and it is suggested that echocardiography can help in differentiating these two entities. In addition to the pulmonary valve finding, increased right ventricular dimension, delayed tricuspid closure and abnormality (prolapse) of the mitral valve were noted. The echocardiographic findings are compared with cardiac catheterization data.

Adolescent↗
PubMed1975

Effect of transducer placement on echocardiographic measurement of left ventricular dimensions.

An echocardiogram from the left ventricle may be used to estimate left ventricular volume and rate of circumferential fiber shortening, to measure posterior wall and interventricular septal thickness and to evaluate the normality of septal motion. Extended application of this technique in this laboratory has emphasized the need for a more standardized means of transducer location and direction. The effect of placing the ultrasonic transducer in several intercostal spaces along the left sternal border was tested in 14 patients. Variability in the left ventricular dimension and the difference in this dimension from end-diastole to end-systole were greater than for duplicate measurements from the same interspace. A system has been developed for more consistent placement of the transducer in each patient, using intracardiac landmarks and observation of transducer orientation to record specific cardiac structures.

Adolescent↗
PubMed1975

Echocardiographic criteria for aortic root dissection.

Echocardiographic findings from 10 patients without clinical indications of aortic root dissection or aortic valve disease from 1 patient with angiographic confirmation of aortic root dissection are reported and compared. Previously reported echocardiographic findings were confirmed in the patient with aortic root dissection. These include (1) a widened posterior or anterior aortic wall, or both; (2) parallel motion of the separated margins of the aortic walls; and (3) aortic root dilatation (42 mm or more at end-systole). However, all three findings were also noted in 5 of the 10 patients without clinical indications of aortic root dissection or aortic valve disease, and at least two of the three findings were noted in the remaining 5 patients. Echocardiographic detection of aortic root dissection appears to be most reliable when clinical indications of the anomaly are present.

Adult↗
PubMed1975

Simultaneous echocardiographic phonocardiographic recordings at rest and during amyl nitrite administration in patients with mitral valve prolapse.

Simultaneous electrocardiograms, phonocardiograms, and echocardiograms were recorded in 21 patients with mitral valve prolapse. Four patients with holosystolic mitral valve prolapse on echocardiogram had smaller resting end-diastolic volumes than the remaining 17 patients with late systolic echocardiopraphy prolapse (p greater than 0.01). Thirteen of the 17 patients with late systolic prolapse had phonocardiograhically recorded auscultatory phenomena. The initial vibrations of the auscultatory phenomena occurred after the onset of echocardiographic prolapse, but prior to maximal echocardiographic mitral valve prolapse. Amyl nitrite was administered to all patients. Three of the 17 patients with late systolic prolapse developed holosystolic prolapse, while the remaining 14 retained the late systolic prolapse pattern during amyl nitrite inhalation. In these 14 patients, the onset of mitral prolapse occurred earlier in systole due to decrease in the duration of systole prior to onset of mitral valve prolapse (p greater than 0.001). This corresponded with the occurrence of auscultatory phenomena earlier in systole. Twelve patients had left ventricular volumes recorded during amyl nitrite inhalation and all showed a decrease in left ventricular volumes (greater than) 0.001). These findings confirm the temporal relationship of mitral valve prolapse and onset of auscultatory phenomena in these patients. It suggests that the movement of auscultatory phenomena earlier in systole during amyl nitrite inhalation is related to earlier prolapse of the mitral valve, and that a decrease in ventricular valume is a tenable explanation for the earlier onset of prolapse.

Administration, Intranasal↗
PubMed1975

Echocardiographic features of supravalvular aortic stenosis.

A method for the echocardiographic detection of supravalvular aortic stenosis (SVAS) is described and the findings in a series of patients are presented. When compared to angiography, the echo tended to underestimate the severity of the supravalvular aortic obstruction. However, echocardiography appears to be a valuable, noninvasive method for detecting SVAS.

Adolescent↗
PubMed1975

Pericardial cyst ten years after acute pericarditis.

A case of pericardial cyst development in the years after an episode of acute pericarditis is reported. The method of diagnosis allowed confirmation of the condition without thoracotomy. These aspects of the case are relevant to the genesis of pericardial cysts in general and establish ultrasound and subsequent contrast roentgenography are advocated as adequate means of diagnosis in this condition.

Aged↗