Abstract
Objective - To identify Doppler echocardiographic (DE) variables that correlate with left ventricular filling pressure (LVFP). Animals - 7 healthy dogs (1 to 3 years old). Procedures - Dogs were anesthetized and instrumented to measure left atrial pressure (LAP), left ventricular pressures, and cardiac output. Nine DE variables of LVFP derived from diastolic time intervals, transmitral and pulmonary venous flow, and tissue Doppler images were measured over a range of hemodynamic states induced by volume loading and right atrial pacing. Associations between simultaneous invasive measures of LVFP and DE measures of LVFP were determined by use of regression analysis. Receiver operating characteristic analysis was used to predict increases in mean LAP on the basis of DE variables. Results - Mean LAP was correlated with several DE variables: the ratio between peak velocity during early diastolic transmitral flow and left ventricular isovolumic relaxation time (peak E:IVRT) during sinus rhythm and during right atrial pacing, IVRT, the ratio between late diastolic transmitral flow velocity and pulmonary venous flow duration, and the interval between onset of early diastolic mitral annulus motion and onset of early diastolic transmitral flow. Cutoff values of 2.20 and 2.17, for peak E:IVRT in dogs with sinus rhythm and atrial pacing predicted increases in mean LAP (≥ 15 mm Hg) with sensitivities of 90% and 100% and specificities of 92% and 100%, respectively. Conclusions and Clinical Relevance - Doppler echocardiography can be used to predict an increase in LVFP in healthy anesthetized dogs subjected to volume loading.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1034-1049 |
| Number of pages | 16 |
| Journal | American Journal of Veterinary Research |
| Volume | 69 |
| Issue number | 8 |
| DOIs | |
| State | Published - Aug 2008 |
| Externally published | Yes |
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- veterinary(all)
Cite this
Estimation of left ventricular filling pressure by use of Doppler echocardiography in healthy anesthetized dogs subjected to acute volume loading. / Schober, Karsten E.; Bonagura, John D.; Scansen, Brian A.; Stern, Joshua A; Ponzio, Nicole M.
In: American Journal of Veterinary Research, Vol. 69, No. 8, 08.2008, p. 1034-1049.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Estimation of left ventricular filling pressure by use of Doppler echocardiography in healthy anesthetized dogs subjected to acute volume loading
AU - Schober, Karsten E.
AU - Bonagura, John D.
AU - Scansen, Brian A.
AU - Stern, Joshua A
AU - Ponzio, Nicole M.
PY - 2008/8
Y1 - 2008/8
N2 - Objective - To identify Doppler echocardiographic (DE) variables that correlate with left ventricular filling pressure (LVFP). Animals - 7 healthy dogs (1 to 3 years old). Procedures - Dogs were anesthetized and instrumented to measure left atrial pressure (LAP), left ventricular pressures, and cardiac output. Nine DE variables of LVFP derived from diastolic time intervals, transmitral and pulmonary venous flow, and tissue Doppler images were measured over a range of hemodynamic states induced by volume loading and right atrial pacing. Associations between simultaneous invasive measures of LVFP and DE measures of LVFP were determined by use of regression analysis. Receiver operating characteristic analysis was used to predict increases in mean LAP on the basis of DE variables. Results - Mean LAP was correlated with several DE variables: the ratio between peak velocity during early diastolic transmitral flow and left ventricular isovolumic relaxation time (peak E:IVRT) during sinus rhythm and during right atrial pacing, IVRT, the ratio between late diastolic transmitral flow velocity and pulmonary venous flow duration, and the interval between onset of early diastolic mitral annulus motion and onset of early diastolic transmitral flow. Cutoff values of 2.20 and 2.17, for peak E:IVRT in dogs with sinus rhythm and atrial pacing predicted increases in mean LAP (≥ 15 mm Hg) with sensitivities of 90% and 100% and specificities of 92% and 100%, respectively. Conclusions and Clinical Relevance - Doppler echocardiography can be used to predict an increase in LVFP in healthy anesthetized dogs subjected to volume loading.
AB - Objective - To identify Doppler echocardiographic (DE) variables that correlate with left ventricular filling pressure (LVFP). Animals - 7 healthy dogs (1 to 3 years old). Procedures - Dogs were anesthetized and instrumented to measure left atrial pressure (LAP), left ventricular pressures, and cardiac output. Nine DE variables of LVFP derived from diastolic time intervals, transmitral and pulmonary venous flow, and tissue Doppler images were measured over a range of hemodynamic states induced by volume loading and right atrial pacing. Associations between simultaneous invasive measures of LVFP and DE measures of LVFP were determined by use of regression analysis. Receiver operating characteristic analysis was used to predict increases in mean LAP on the basis of DE variables. Results - Mean LAP was correlated with several DE variables: the ratio between peak velocity during early diastolic transmitral flow and left ventricular isovolumic relaxation time (peak E:IVRT) during sinus rhythm and during right atrial pacing, IVRT, the ratio between late diastolic transmitral flow velocity and pulmonary venous flow duration, and the interval between onset of early diastolic mitral annulus motion and onset of early diastolic transmitral flow. Cutoff values of 2.20 and 2.17, for peak E:IVRT in dogs with sinus rhythm and atrial pacing predicted increases in mean LAP (≥ 15 mm Hg) with sensitivities of 90% and 100% and specificities of 92% and 100%, respectively. Conclusions and Clinical Relevance - Doppler echocardiography can be used to predict an increase in LVFP in healthy anesthetized dogs subjected to volume loading.
UR - http://www.scopus.com/inward/record.url?scp=49749119138&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=49749119138&partnerID=8YFLogxK
U2 - 10.2460/ajvr.69.8.1034
DO - 10.2460/ajvr.69.8.1034
M3 - Article
C2 - 18672968
AN - SCOPUS:49749119138
VL - 69
SP - 1034
EP - 1049
JO - American Journal of Veterinary Research
JF - American Journal of Veterinary Research
SN - 0002-9645
IS - 8
ER -