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[Analysis of mitral inflow velocity pattern in relation to left ventricular end-diastolic pressure]

M Okamoto1, E Sakura, H Shimamoto

  • 1First Department of Internal Medicine, Hiroshima University School of Medicine.

Journal of Cardiography
|December 1, 1986
PubMed

Insights

Doppler echocardiography reveals mean acceleration rates to peak velocities (ACR/R) correlate with left ventricular end-diastolic pressure (LVEDP). This finding aids in assessing heart disease severity using mitral inflow velocity patterns.

Area of Science:

  • Cardiology
  • Echocardiography
  • Physiology

Context:

  • Assessing left ventricular end-diastolic pressure (LVEDP) is crucial for evaluating diastolic heart function.
  • Pulsed Doppler echocardiography provides insights into mitral inflow velocity patterns.
  • Mitral inflow velocity parameters, including the ratio of peak velocities during atrial contraction to rapid filling (A/R) and mean acceleration rates to peak velocities during rapid filling (ACR/R), are derived from echocardiographic data.

Purpose:

  • To evaluate the relationship between mitral inflow velocity patterns and LVEDP in patients with heart disease.
  • To determine if A/R and ACR/R ratios can serve as indicators of LVEDP.
  • To examine the changes in these ratios following induced elevation of LVEDP.

Summary:

  • A significant correlation was found between ACR/R and LVEDP (r = 0.49), while A/R did not show a significant correlation.
  • Specific LVEDP values were associated with different combinations of A/R and ACR/R.
  • Methoxamine infusion to elevate LVEDP resulted in increased A/R in normal range cases and decreased A/R in cases with A/R > 1.0, with a tendency for ACR/R to increase with rising LVEDP.

Impact:

  • ACR/R emerges as a potentially valuable Doppler-derived parameter for non-invasively assessing LVEDP in heart disease.
  • These findings contribute to a better understanding of diastolic function assessment using echocardiography.
  • The study provides a basis for further research into the clinical utility of mitral inflow velocity patterns for hemodynamic evaluation.

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