Intervendor Variabilities of Left and Right Ventricular Myocardial Velocities among Three Tissue Doppler Echocardiography Systems.
BACKGROUND
Whether an intervendor discordance of myocardial velocities determined by tissue Doppler echocardiography (TDE) can be generalized remains unclear. We compared intervendor variabilities of left ventricular (LV) and right ventricular (RV) myocardial velocities among three TDE systems.


METHODS
Examinations with TDE were performed in 41 healthy subjects and 11 patients with cardiovascular risk factors (CVR) using α-7 (V1, Hitachi Aloka Medical), Artida (V2, Toshiba Medical Systems), and Vivid E9 (V3, GE Healthcare) on the same day. Peak systolic (s'), early diastolic (e'), and late diastolic (a') myocardial velocities at medial and lateral sites of the mitral annulus and lateral site of the tricuspid annulus were measured using both pulsed-wave TDE and color TDE. Intra-observer and inter-observer variabilities were determined in 10 subjects and test-retest variability in 14 subjects.


RESULTS
As for test-retest variability, reproducibilities of LV and RV myocardial velocities determined by pulsed-wave TDE and color TDE were relatively low but comparable between V1, V2, and V3. Myocardial velocities in healthy subjects determined by both pulsed-wave TDE and color TDE were significantly different among the three TDE systems. Myocardial velocities by pulsed-wave TDE in V3 were 2-12% lower (P < 0.05) than those by V2 and 5-14% lower (P < 0.05) than those by V1. Similar differences in myocardial velocities determined by both pulsed-wave TDE and color TDE were found in patients with CVR.


CONCLUSIONS
LV and RV myocardial velocities determined by both pulsed-wave TDE and color TDE are vendor dependent, and reproducibility of the myocardial velocities determined by both TDE systems is relatively low.
Division of Laboratory Diagnosis, Sapporo Medical University Hospital, Sapporo, Japan.
Kiyoshi
K
Abe
Department of Infection Control and Clinical Laboratory Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.|Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Satoshi
S
Yuda
Division of Laboratory Diagnosis, Sapporo Medical University Hospital, Sapporo, Japan.
Yasumi
Y
Sato
Division of Laboratory Diagnosis, Sapporo Medical University Hospital, Sapporo, Japan.
Kenji
K
Yasui
Department of Clinical Laboratory, Hokkaido Prefectural School of Hygiene, Sapporo, Japan.
Ryosuke
R
Nishi
Department of Clinical Laboratory, Hokkaido Prefectural School of Hygiene, Sapporo, Japan.
Kyosuke
K
Hanada
Department of Clinical Laboratory, Hokkaido Prefectural School of Hygiene, Sapporo, Japan.
Naoko
N
Hashimoto
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Mina
M
Kawamukai
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Hidemichi
H
Kouzu
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Atsuko
A
Muranaka
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Akiyoshi
A
Hashimoto
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Kazufumi
K
Tsuchihashi
Division of Laboratory Diagnosis, Sapporo Medical University Hospital, Sapporo, Japan.|Department of Infection Control and Clinical Laboratory Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Naoki
N
Watanabe
Department of Cardiovascular, Renal and Metabolic Medicine, Sapporo Medical University School of Medicine, Sapporo, Japan.
Tetsuji
T
Miura
D054459:Elasticity Imaging Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006801:Humans; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013318:Stroke Volume; D018754:Ventricular Dysfunction / Q000000981:diagnostic imaging* / Q000503:physiopathology*
intervendor variability; left ventricular function; myocardial velocity; reproducibility; right ventricular function; tissue Doppler echocardiography