Myocardial Velocities Differ Based on Age and Gender
Differences observed by magnetic resonance tissue mapping
THURSDAY, Dec. 10 (HealthDay News) -- Left ventricle velocities determined by magnetic resonance tissue phase mapping show differences based on gender and age, according to a study published online Dec. 8 in Circulation: Cardiovascular Imaging.
Daniela Föll, M.D., and colleagues from University Hospital Freiburg in Germany performed magnetic resonance tissue phase mapping to assess left ventricular motion in three directions (radial, long-axis, rotational) and at three locations (basal, mid-ventricular, apical short axis) based on age and gender in 58 healthy volunteers.
The researchers found that, with increasing age, both men and women had significantly reduced and prolonged long-axis and radial velocities during diastole, and reduced long-axis velocities and apical rotation during systole. Women had significantly reduced systolic twist, apical rotation, and systolic radial velocities. Compared with men, young women had higher long-axis velocities in basal segments, while older women had lower long-axis velocities in basal segments. Older women also had a prolonged time to peak diastolic apical rotation compared with men.
"In conclusion, our method enables a comprehensive analysis of all myocardial velocities covering the entire left ventricle with high temporal and spatial resolution," Föll and colleagues write. "Our data clearly demonstrate that age and gender has an important impact on myocardial performance."