TY - JOUR
T1 - Evaluation of left ventricular short- and long-axis function in severe mitral regurgitation using 2-dimensional strain echocardiography
AU - Kim, Min Seok
AU - Kim, Yong Jin
AU - Kim, Hyung Kwan
AU - Han, Joo Yong
AU - Chun, Hong Gu
AU - Kim, Hee Chan
AU - Sohn, Dae Won
AU - Oh, Byung Hee
AU - Park, Young Bae
PY - 2009/2
Y1 - 2009/2
N2 - Background: Few data exist on the changes in left ventricular (LV) short- and long-axis function and their usefulness as markers of LV contractile function in patients with chronic, severe mitral regurgitation (MR). Methods: We studied 59 patients who had severe MR with an ejection fraction ≥50% and 34 healthy controls. Speckle tracking imaging was performed to measure peak systolic radial (SRR), circumferential (SRC), and longitudinal strain rates (SRL). In all patients, the peak rate of LV pressure rise (peak dP/dt) was measured using a micromanometer-tipped catheter. The patients were subdivided into patients with preserved (group 1, peak dP/dt ≥1,300 mm Hg/s [n = 30]) and depressed (group 2 [n = 29]) contractile function. Results: SRL was significantly depressed in groups 1 and 2 when compared with the control group, but there was no difference between groups 1 and 2. In contrast, SRR and SRC were depressed only in group 2, whereas there were no differences between the control group and group 1. SRR and SRC correlated well with peak dP/dt (r = 0.71, P <.001 and r = -0.63, P <.001, respectively), whereas SRL did not. These findings suggest that LV long-axis function becomes depressed earlier than short-axis function in the chronic remodeling process. Conclusions: Left ventricular short-axis function is a useful marker of LV contractility in patients with chronic, severe MR. Left ventricular long-axis function becomes depressed earlier in the chronic remodeling process. Therefore, evaluation of short-axis as well as long-axis function might be important for better assessment of LV contractile function in these patients.
AB - Background: Few data exist on the changes in left ventricular (LV) short- and long-axis function and their usefulness as markers of LV contractile function in patients with chronic, severe mitral regurgitation (MR). Methods: We studied 59 patients who had severe MR with an ejection fraction ≥50% and 34 healthy controls. Speckle tracking imaging was performed to measure peak systolic radial (SRR), circumferential (SRC), and longitudinal strain rates (SRL). In all patients, the peak rate of LV pressure rise (peak dP/dt) was measured using a micromanometer-tipped catheter. The patients were subdivided into patients with preserved (group 1, peak dP/dt ≥1,300 mm Hg/s [n = 30]) and depressed (group 2 [n = 29]) contractile function. Results: SRL was significantly depressed in groups 1 and 2 when compared with the control group, but there was no difference between groups 1 and 2. In contrast, SRR and SRC were depressed only in group 2, whereas there were no differences between the control group and group 1. SRR and SRC correlated well with peak dP/dt (r = 0.71, P <.001 and r = -0.63, P <.001, respectively), whereas SRL did not. These findings suggest that LV long-axis function becomes depressed earlier than short-axis function in the chronic remodeling process. Conclusions: Left ventricular short-axis function is a useful marker of LV contractility in patients with chronic, severe MR. Left ventricular long-axis function becomes depressed earlier in the chronic remodeling process. Therefore, evaluation of short-axis as well as long-axis function might be important for better assessment of LV contractile function in these patients.
UR - http://www.scopus.com/inward/record.url?scp=59149104797&partnerID=8YFLogxK
U2 - 10.1016/j.ahj.2008.10.004
DO - 10.1016/j.ahj.2008.10.004
M3 - Article
C2 - 19185644
AN - SCOPUS:59149104797
VL - 157
SP - 345
EP - 351
JO - American Heart Journal
JF - American Heart Journal
SN - 0002-8703
IS - 2
ER -