Passive leg-raise is helpful to identify impaired diastolic functional reserve during exercise in patients with abnormal myocardial relaxation.
BACKGROUND
The aim of this study was to demonstrate the usefulness of leg raise in identifying lower diastolic functional reserve to exercise.


METHODS
One hundred fifty-four patients with abnormal left ventricular relaxation on Doppler mitral inflow with preserved left ventricular ejection fractions were enrolled. After resting evaluations, Doppler echocardiographic measurements were repeated during passive leg raise and graded supine bicycle exercise.


RESULTS
Patients were divided into 3 groups according to resting E/e' ratio and its response to leg raise: group IA (persistent E/e' < 15 [n = 112]), group IB (change to E/e' > or = 15 after leg raise [n = 19]), and group II (persistent E/e' > or = 15 [n = 23]). Group II had lower S', e', and diastolic reserve index values during exercise compared with group IA but not with group IB. Group IB had higher E/e' ratios during exercise and lower diastolic functional reserve index values accompanied by lower exercise capacity compared with group IA.


CONCLUSIONS
Passive leg raise might be helpful in identifying a subgroup with lower diastolic functional reserve and lower exercise capacity among patients with abnormal relaxation.
Cardiology Division, Heart Center, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul, South Korea.
Eui-Young
EY
Choi
Chi Young
CY
Shim
Sung-Ai
SA
Kim
Sang Jae
SJ
Rhee
Donghoon
D
Choi
Se-Joong
SJ
Rim
Yangsoo
Y
Jang
Namsik
N
Chung
Seung-Yun
SY
Cho
Jong-Won
JW
Ha
D000465:Algorithms; D004452:Echocardiography / Q000379:methods*; D005080:Exercise Test / Q000379:methods*; D005260:Female; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007866:Leg; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging*