Left ventricular systolic and diastolic function by echocardiogram in pseudoxanthoma elasticum.

Pseudoxanthoma elasticum is an inherited systemic disease of connective tissue with possible cardiac involvement. Nineteen patients with pseudoxanthoma elasticum without a history of cardiac disease were investigated by echocardiography using standard measurements and tissue Doppler imaging. Systolic function was normal, but diastolic parameters were abnormal in 7 patients.

Cardiovascular effects of androgenic anabolic steroids in male bodybuilders determined by tissue Doppler imaging.

The effects of anabolic androgenic steroids (AASs) on left ventricular (LV) diastolic function in strength-trained athletes are controversial. The main objective of this study was to evaluate the effects of regular AAS administration in bodybuilders using pulsed tissue Doppler imaging (TDI) to evaluate LV relaxation properties. Fifteen male bodybuilders with a history of intensive, long-term strength training and 16 age-matched sedentary controls were recruited.

Volume measurements in nuclear medicine gated SPECT and 4D echocardiography: validation using a dynamic cardiac phantom.

Purpose: A dynamic cardiac phantom was used as a reference to compare volumes measured with gated SPECT and 4D echocardiography.

Material And Methods: Gated SPECT data were acquired with a standard single-head gamma camera, and the volume reconstructions were carried out using the Mirage software by Segami. 4D echocardiography used a new prototype of rotating scan head to acquire ultrasound images during a cardiac cycle, used to reconstruct the volume deformations as a function of time.

Left ventricular function in endurance-trained children by tissue Doppler imaging.

Unlabelled: In children and adults, endurance training increases resting stroke volume, mainly as a result of an increase in left ventricular (LV) filling.

Purpose: To evaluate whether the LV morphologic and functional alterations responsible for this increase in cardiac filling are similar in children and young adults.

Methods: Standard echocardiography (LV morphology and function) and tissue Doppler imaging (LV relaxation properties) were assessed in 10 adult cyclists, 13 age-matched sedentary controls, 12 boy cyclists, and 11 untrained boys.

Influence of body composition, hemoglobin concentration, and cardiac size and function of gender differences in maximal oxygen uptake in prepubertal children.

Objective: To determine the relative contribution of the gender difference in body composition, blood hemoglobin concentration, and cardiac dimension and function at rest and exercise of the gender difference in maximal oxygen uptake (O(2)max) in 10- to 12-year-old children.

Subjects: Thirty-five healthy children (17 girls and 18 boys; mean +/- SD age, 10.5 +/- 0.

Left ventricular dynamics during early recovery from maximal exercise in boys and men.

Unlabelled: A transient increase in left ventricular emptying has been reported in adults during the early recovery from submaximal upright exercise.

Purpose: To investigate whether this "overshoot" occurs also after maximal exercise, and whether it is an age-related phenomenon.

Methods: Ten healthy young men (mean age: 22.

Central and peripheral cardiovascular adaptations during a maximal cycle exercise in boys and men.

Purpose: Stroke volume response to exercise depends on changes in cardiac filling, intrinsic myocardial contractility, and left ventricular afterload. The purpose of this study was to compare these responses during an upright cycle test performed until exhaustion in children and adults.

Methods: Stroke volume, cardiac output (Doppler echocardiography), left ventricular dimensions (two-dimensional and time-movement echocardiography), as well as arterial pressure and systemic vascular resistance (SVR) were assessed in 17 boys (mean age, 11.