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Influence of cyclic variation of right ventricular volume on left ventricular mechanical parameters measured with conductance catheter.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Tanoue, Yoshihisa Morita, Shigeki Hisahara, Manabu Tominaga, Ryuji Kawachi, Yoshito Yasui, Hisataka |
| Copyright Year | 2001 |
| Abstract | The conductance catheter is widely used for the continuous measurement of the left ventricular (LV) pressure-volume loops. Cyclical change of the right ventricular (RV) volume may alter the parallel conductance volume, thereby affecting the LV mechanical parameters. Using 8 open-chest adult mongrel dogs, multiple LV pressure-volume loops were obtained by 2 methods: first with a vena cava occlusion (VCO) method, which involved RV volume alteration, and second with a right-heart-bypass (RHB) preparation, which decompressed the right ventricle completely. The slope of the end-systolic pressure-volume relation (Ees), the end-systolic volume associated with the end-systolic pressure of 100 mmHg (V100,es), stiffness constant (beta), and the end-diastolic volume associated with the end-diastolic pressure of 9 mmHg (V9,ed) were calculated from each loop. There was minimal influence from RV volume alteration on systolic-phase indices [Ees (VCO method, 6.37 +/- 1.91 mmHg/ml; RHB preparation, 6.60 +/- 1.66mmHg/ml; p=0.356), and V100,es (VCO method, 18.4 +/- 9.3ml; RHB preparation, 17.8 +/- 9.0 ml; p=0.681)], but there was a significant influence on diastolic-phase indices [beta (VCO method, 0.0599 +/- 0.0152; RHB preparation, 0.0839 +/- 0.0150; p=0.007), and V9,ed (VCO method, 35.6 +/- 11.3 ml; RHB preparation, 31.9 +/- 12.3 ml; p=0.001)]. The increase in the RV volume in the diastolic phase increased the parallel conductance volume, causing overestimation of the LV diastolic volume measured by the conductance catheter. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.jstage.jst.go.jp/article/jcj/65/8/65_8_749/_pdf |
| PubMed reference number | 11502053v1 |
| Volume Number | 65 |
| Issue Number | 8 |
| Journal | Japanese circulation journal |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Diastole Diastolic blood pressure Heart Ventricle Heart failure Left Ventricular Hypertrophy Mix Breed Residual volume Right ventricular structure Structure of vein of trunk Systolic Pressure Vena Cava Occlusion Vena cava structure Ventricular Fibrillation bypass torr |
| Content Type | Text |
| Resource Type | Article |
