Biomedical subjects

J D Markenvard

Publications and source records attributed to J D Markenvard.

3 recordsLinked to original sources

PubMed1995

[Quality control of echocardiographic examination in a central hospital].

The purpose of this consecutive retrospective study of echocardiographic descriptions and matching case reports was to examine the number of echocardiographic examinations and their consequences for the treatment of the patients. This study was performed in a district hospital in Svendborg, Denmark, during the period from 1.12.93 to 31.03.94 (n = 195). We found that more women than men in the over 69 age group were examined with echocardiographic examination whereas fewer women than men were examined in the 59-69 year-old age group. In 48% of the cases, the actual clinical suspicion was verified by echocardiography; in 40% the echocardiography did not show anything abnormal and in 12% a different diagnosis was found. The echocardiographic examination had a consequence for 29% of the patients regardless the actual clinical suspicion. The frequency of a consequence was the same for the expected and the unexpected finding by echocardiography. Conclusively, this massive rise in the number of performed echocardiographies (n = 51 in 1983; n = 595 in 1993) cannot be reduced by being more restrictive in performing echocardiography for any single clinical suspicion, because all indications for performing echocardiography seem to have equal therapeutic consequences.

Adolescent↗

PubMed1995

[Different use of thrombolytic therapy in men and women with acute myocardial infarction].

Previous studies have reported a difference between the use of invasive therapeutic procedures in men and women with coronary artery disease. The aim of this study was to evaluate if this difference also exists in the initial treatment of acute myocardial infarction and for numbers of non-invasive procedures performed. We examined 448 patients (283 men and 165 women). We found a significant gender difference concerning the numbers treated with streptokinase, namely 47.3% of the men compared to 33.3% of the women. The delay from onset of symptoms until admission was nearly the same for both sexes. There was, however, a considerably longer in-hospital delay before start of treatment for the women compared to the men. The time-difference was significant for patients below 70 years of age. We found no gender difference in the numbers of performed exercise-tests and echocardiographic examinations. There was a slightly non-significant higher mortality among the women. We also calculated the numbers of patients without contraindications to treatment with streptokinase who were not treated, here we found no difference between the sexes. We conclude that women with symptoms suggesting acute myocardial infarction should be carefully evaluated immediately after admission to hospital to improve thrombolytic therapy.

Aged↗

PubMed1992

[Dynamic continuous vectorcardiography].

Continuous dynamic vectorcardiography is an ideal method for monitoring patients with myocardial ischemia. The monitoring is a non-invasive and real time registration and simultaneously safe and reproducible. The method has proved valuable for describing the evolution in different ischemic heart diseases. The method measures the electric myocardial activity in three orthogonal leads and a computer calculates the different vectorcardiographic parameters for the ST- and QRS-complexes. Vectorcardiographic registration is feasible for computer analysis, because it can summarize all information in a few parameters. Using continuous registration, the different parameters can show dynamic evolution and, in this way, describe the variability during acute myocardial infarction and unstable angina pectoris. The method also made it possible to evaluate anti-ischemic treatment in patients, as for example thrombolytic therapy.

Humans↗