### Abstract

We hypothesize that a simplified version of the Euler equation (SEE) utilizing differences in velocity over a distance and time as obtained by Color Doppler M-mode (CMM) echocardiography can approximate actual peak transmitral pressure gradients (ΔP_{TM}). Methods: In 14 patients undergoing open-heart surgery, ΔP_{TM} was measured under various hemodynamic conditions using 2 high fidelity transducers, 5 cm apart. Transesophageal CMM images were simultaneously acquired and a customized image analysis application was used to abstract spatiotemporal velocity characteristics. Using both the SEE and a simplified Bernoulli equations, ΔP_{TM} were determined and compared to the actual ΔP_{TM}. Results: While the simplified Bernoulli equation resulted in a poor estimate (y = 0.075x+0.71, r = 0.45), the ΔP_{TM} obtained using the SEE correlated strongly (y = 0.79x+0.48, r = 0.91) with the actual measurements. Conclusions: Semi-automated analysis of CMM images using a SEE can accurately estimate actual ΔP_{TM}.

Original language | English (US) |
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Title of host publication | Computers in Cardiology |

Publisher | IEEE |

Pages | 181-184 |

Number of pages | 4 |

State | Published - 1999 |

Externally published | Yes |

Event | The 26th Annual Meeting: Computers in Cardiology 1999 - Hannover, Ger Duration: Sep 26 1999 → Sep 29 1999 |

### Other

Other | The 26th Annual Meeting: Computers in Cardiology 1999 |
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City | Hannover, Ger |

Period | 9/26/99 → 9/29/99 |

### Fingerprint

### ASJC Scopus subject areas

- Software
- Cardiology and Cardiovascular Medicine

### Cite this

*Computers in Cardiology*(pp. 181-184). IEEE.

**Semi-automated analysis of color M-mode echocardiographic images for determining transmitral pressure gradients using a simplified Euler equation.** / Firstenberg, Michael S.; Greenberg, Neil L.; Garcia, Mario J.; Castro, Peter L.; Prior, David L.; Smedira, Nicholas G.; Thomas, James D.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Computers in Cardiology.*IEEE, pp. 181-184, The 26th Annual Meeting: Computers in Cardiology 1999, Hannover, Ger, 9/26/99.

}

TY - GEN

T1 - Semi-automated analysis of color M-mode echocardiographic images for determining transmitral pressure gradients using a simplified Euler equation

AU - Firstenberg, Michael S.

AU - Greenberg, Neil L.

AU - Garcia, Mario J.

AU - Castro, Peter L.

AU - Prior, David L.

AU - Smedira, Nicholas G.

AU - Thomas, James D.

PY - 1999

Y1 - 1999

N2 - We hypothesize that a simplified version of the Euler equation (SEE) utilizing differences in velocity over a distance and time as obtained by Color Doppler M-mode (CMM) echocardiography can approximate actual peak transmitral pressure gradients (ΔPTM). Methods: In 14 patients undergoing open-heart surgery, ΔPTM was measured under various hemodynamic conditions using 2 high fidelity transducers, 5 cm apart. Transesophageal CMM images were simultaneously acquired and a customized image analysis application was used to abstract spatiotemporal velocity characteristics. Using both the SEE and a simplified Bernoulli equations, ΔPTM were determined and compared to the actual ΔPTM. Results: While the simplified Bernoulli equation resulted in a poor estimate (y = 0.075x+0.71, r = 0.45), the ΔPTM obtained using the SEE correlated strongly (y = 0.79x+0.48, r = 0.91) with the actual measurements. Conclusions: Semi-automated analysis of CMM images using a SEE can accurately estimate actual ΔPTM.

AB - We hypothesize that a simplified version of the Euler equation (SEE) utilizing differences in velocity over a distance and time as obtained by Color Doppler M-mode (CMM) echocardiography can approximate actual peak transmitral pressure gradients (ΔPTM). Methods: In 14 patients undergoing open-heart surgery, ΔPTM was measured under various hemodynamic conditions using 2 high fidelity transducers, 5 cm apart. Transesophageal CMM images were simultaneously acquired and a customized image analysis application was used to abstract spatiotemporal velocity characteristics. Using both the SEE and a simplified Bernoulli equations, ΔPTM were determined and compared to the actual ΔPTM. Results: While the simplified Bernoulli equation resulted in a poor estimate (y = 0.075x+0.71, r = 0.45), the ΔPTM obtained using the SEE correlated strongly (y = 0.79x+0.48, r = 0.91) with the actual measurements. Conclusions: Semi-automated analysis of CMM images using a SEE can accurately estimate actual ΔPTM.

UR - http://www.scopus.com/inward/record.url?scp=0033282574&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033282574&partnerID=8YFLogxK

M3 - Conference contribution

SP - 181

EP - 184

BT - Computers in Cardiology

PB - IEEE

ER -