Biomedical subjects

Gunnar Plehn

Publications and source records attributed to Gunnar Plehn.

4 recordsLinked to original sources

PubMed2003

Parameters of left ventricular diastolic function 48 hours after coronary angioplasty and stent implantation.

INTRODUCTION: It has been reported that stent implantation results in an earlier and more pronounced improvement of coronary flow reserve in comparison to conventional balloon angioplasty. Whether this phenomenon translates into hemodynamic changes of left ventricular systolic and diastolic function has not been investigated. This study was designed to determine whether stenting leads to greater changes in measures of diastolic dysfunction than plain angioplasty alone. METHODS: Parameters of diastolic function were ascertained by Doppler echocardiography in 194 patients with single-vessel disease before and 48 hours after elective coronary angioplasty. A total of 116 patients were initially successfully treated with coronary angioplasty. In 78 patients, stents were used to improve an inadequate result after coronary angioplasty. The parameters of left ventricular diastolic function were evaluated before and 48 hours after coronary intervention by Doppler echocardiography. Ejection fraction was determined and used to characterize systolic left ventricular function. RESULTS: Both patient groups (116 patients with coronary angioplasty, 78 patients with combined coronary angioplasty and stent implantation) showed no relevant differences concerning sex, age, atherosclerotic risk factors, exercise capacity and results of exercise electrocardiography. All patients who underwent stent implantation showed an early improvement of left ventricular diastolic function 48 hours after intervention. Surprisingly, there was no significant short-term improvement (48 hours) of diastolic function in patients with initially successful angioplasty. CONCLUSION: Stent implantation results in improved left ventricular diastolic function in comparison to conventional balloon angioplasty. This has to be attributed to a more immediate and increased antiischemic effectiveness due to the scaffolding properties of stents.

Aged↗

PubMed2002

[The current status of noninvasive cardiac diagnosis in women with suspected coronary heart disease].

BACKGROUND AND OBJECTIVE: Coronary artery disease is the leading cause of mortality among women in the industrial countries. Unfortunately, the routinely available noninvasive tests used to screen the presence of coronary artery disease have been relatively insensitive and nonspecific for women. The aim of this study was to evaluate the importance of pretest coronary artery disease probability and to determine whether the evaluation of left ventricular diastolic parameters is a relevant diagnostic tool in women with suspected coronary artery disease. PATIENTS AND METHODS: Electrocardiography at rest and during exercise, echocardiography at rest with evaluation of systolic and diastolic functional parameters, dobutamine stress echocardiography, exercise thallium myocardial scintigraphy, and coronary angiography were performed in 180 consecutive patients with suspected coronary artery disease. RESULTS: Coronary angiography revealed significant coronary artery disease in 104 patients. Angina pectoris, resting and exercise electrocardiography had a very low pretest probability in women. Dobutamine stress echocardiography, myocardial scintigraphy and the evaluation of left ventricular diastolic function showed less relevant gender-related differences and had a significantly better pretest probability. CONCLUSION: Dobutamine stress echocardiography and exercise thallium myocardial scintigraphy are reliable methods of diagnosing coronary artery disease in women. Echocardiographic assessment of diastolic left ventricular function represents another screening test for the evaluation of suspected coronary artery disease in women. All three methods, however, are not able to discriminate between coronary macro- or microangiopathy.

Aged↗

PubMed2002

Left ventricular diastolic function in physiologic and pathologic hypertrophy.

BACKGROUND: Patients with hypertensive heart disease and left ventricular hypertrophy demonstrate an impaired left ventricular diastolic filling pattern. The aim of this study was to find out whether physiologic left ventricular hypertrophy induced by endurance training causes disturbances in left ventricular systolic and diastolic filling. METHODS: We examined 49 athletes with left ventricular (LV) hypertrophy due to endurance training, 49 patients with LV hypertrophy due to arterial hypertension, and 26 untrained healthy control subjects by conventional echocardiography. Parameters of LV diastolic filling using pulse wave and color flow Doppler were also assessed. RESULTS: All three study groups showed normal fractional shortening and mid-wall fractional shortening. Conventional echocardiography revealed a higher LV muscle mass index in the two study groups compared with the controls (athletes, 99 +/- 10 g; hypertensive patients, 95 +/- 11 g: controls: 52 +/- 7 g; P < .01 for athletes and hypertensive patients). In patients with arterial hypertension, a diastolic dysfunction consisting of a delayed relaxation pattern with a decrease in maximal early velocity of diastolic filling (0.44 +/- 0.1 m/sec) and a compensatory increase of the maximal late velocity of diastolic filling (0.53 +/- 0.1 m/sec) was demonstrated. In athletes with physiologic LV hypertrophy, a normal LV diastolic filling pattern was documented. CONCLUSIONS: Doppler echocardiographic parameters of LV diastolic function can be of diagnostic importance for discrimination between pathologic and physiologic LV hypertrophy.

Adult↗

PubMed2002

Left ventricular hypertrophy and diastolic dysfunction in healthy pregnant women.

OBJECTIVE: The purpose of this study was to examine which hemodynamic parameters change under the natural volume overload of pregnancy. STUDY DESIGN: 46 healthy pregnant women were echocardiographically examined during the course of pregnancy. To evaluate left ventricular diastolic function, mitral inflow and pulmonary venous flow profiles were used. Fractional shortening and left ventricular muscle mass were calculated. RESULTS: In the course of pregnancy the left ventricular muscle mass index increased (from 66 +/- 6 to 96 +/- 9 g/m(2)), fractional shortening decreased (from 38 +/- 4 to 32 +/- 6%) and a disturbed diastolic relaxation pattern was documented. Eight weeks after delivery, all left ventricular systolic and diastolic functional parameters returned to normal values. CONCLUSION: The natural volume overload in pregnancy leads to a reversible 'physiological' left ventricular hypertrophy, a short-term decrease in systolic function and a significant change in left ventricular diastolic function.

Adult↗