Noninvasive quantification of coronary blood flow reserve in humans using myocardial contrast echocardiography

Kevin Wei, Michael Ragosta, Jerrel Thorpe, Matthew Coggins, Sally Moos, Sanjiv Kaul

Research output: Contribution to journalArticlepeer-review

210 Scopus citations

Abstract

Background - We hypothesized that coronary blood flow (CBF) reserve could be quantified noninvasively in humans using myocardial contrast echocardiography (MCE). Methods and Results - Eleven patients with normal epicardial coronary arteries (group I) and 19 with single-vessel coronary stenosis (group II) underwent quantitative coronary angiography, MCE, and CBF velocity measurements at rest and during intravenous adenosine infusion. In group I patients, MCE-derived myocardial blood flow (MBF) velocity reserve (2.4±0.08) was similar to CBF velocity reserve using a Doppler flow wire (2.4±1.1). Patients with a single risk factor had a significantly higher MBF reserve (3.0±0.89) than those with ≥2 risk factors (1.7±0.22). In group II patients, significant differences were found in MBF velocity reserve in patients with mild <50%, moderate (50% to 75%), or severe (>75%) stenoses (2.2±0.40, 1.6±0.65, and 0.55±0.19, respectively; P=0.005). A linear relation was found between flow velocity reserve determined using the 2 methods (r=0.76, P<0.001), and a curvilinear relation was noted between the percent coronary stenosis measured using quantitative coronary angiography and velocity reserve using both methods. Conclusions - CBF reserve can be measured in humans using MCE. This method may allow the noninvasive assessment of coronary stenosis severity and the detection of microvascular dysfunction.

Original languageEnglish (US)
Pages (from-to)2560-2565
Number of pages6
JournalCirculation
Volume103
Issue number21
DOIs
StatePublished - May 29 2001
Externally publishedYes

Keywords

  • Blood flow
  • Contrast media
  • Coronary disease
  • Echocardiography

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine
  • Physiology (medical)

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