### Abstract

A simplified formula (cardiac output/[transvalvular pressure gradient]( 1/2 )) has been proposed as an alternative to the Gorlin equation for determining valve area in patients with mitral stenosis. This study was done (a) to assess the relationship between the results of the simplified formula and those of the Gorlin equation in patients with mitral stenosis and (b) to determine the clinical characteristics most likely to be associated with a disparity between the 2 formulae. In 96 patients with mitral stenosis, the disparity between the 2 formulae was > 0.2 cm^{2} in 43 (45%) and ≥ 0.35 cm^{2} in 21 (22%). The results of the simplified formula were especially likely to be disparate from those of the Gorlin equation in those whose heart rates were > 100 beats/minute. Thus, in the patient with mitral stenosis, the simplified formula should be used with caution and cognizance of its potential inaccuracy, particularly if the patient is tachycardic.

Original language | English (US) |
---|---|

Pages (from-to) | 81-83 |

Number of pages | 3 |

Journal | Catheterization and Cardiovascular Diagnosis |

Volume | 23 |

Issue number | 2 |

State | Published - 1991 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Cardiology and Cardiovascular Medicine

### Cite this

*Catheterization and Cardiovascular Diagnosis*,

*23*(2), 81-83.

**Original studies : Simplified formula for the calculation of mitral valve area: Potential inaccuracies in patients with tachycardia.** / Brogan, W. C.; Lange, R. A.; Hillis, L. D.

Research output: Contribution to journal › Article

*Catheterization and Cardiovascular Diagnosis*, vol. 23, no. 2, pp. 81-83.

}

TY - JOUR

T1 - Original studies

T2 - Simplified formula for the calculation of mitral valve area: Potential inaccuracies in patients with tachycardia

AU - Brogan, W. C.

AU - Lange, R. A.

AU - Hillis, L. D.

PY - 1991

Y1 - 1991

N2 - A simplified formula (cardiac output/[transvalvular pressure gradient]( 1/2 )) has been proposed as an alternative to the Gorlin equation for determining valve area in patients with mitral stenosis. This study was done (a) to assess the relationship between the results of the simplified formula and those of the Gorlin equation in patients with mitral stenosis and (b) to determine the clinical characteristics most likely to be associated with a disparity between the 2 formulae. In 96 patients with mitral stenosis, the disparity between the 2 formulae was > 0.2 cm2 in 43 (45%) and ≥ 0.35 cm2 in 21 (22%). The results of the simplified formula were especially likely to be disparate from those of the Gorlin equation in those whose heart rates were > 100 beats/minute. Thus, in the patient with mitral stenosis, the simplified formula should be used with caution and cognizance of its potential inaccuracy, particularly if the patient is tachycardic.

AB - A simplified formula (cardiac output/[transvalvular pressure gradient]( 1/2 )) has been proposed as an alternative to the Gorlin equation for determining valve area in patients with mitral stenosis. This study was done (a) to assess the relationship between the results of the simplified formula and those of the Gorlin equation in patients with mitral stenosis and (b) to determine the clinical characteristics most likely to be associated with a disparity between the 2 formulae. In 96 patients with mitral stenosis, the disparity between the 2 formulae was > 0.2 cm2 in 43 (45%) and ≥ 0.35 cm2 in 21 (22%). The results of the simplified formula were especially likely to be disparate from those of the Gorlin equation in those whose heart rates were > 100 beats/minute. Thus, in the patient with mitral stenosis, the simplified formula should be used with caution and cognizance of its potential inaccuracy, particularly if the patient is tachycardic.

UR - http://www.scopus.com/inward/record.url?scp=0026177718&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026177718&partnerID=8YFLogxK

M3 - Article

C2 - 2070407

AN - SCOPUS:0026177718

VL - 23

SP - 81

EP - 83

JO - Catheterization and Cardiovascular Interventions

JF - Catheterization and Cardiovascular Interventions

SN - 1522-1946

IS - 2

ER -