Prevalence of Coronary Microvascular Dysfunction Among Patients With Chest Pain and Nonobstructive Coronary Artery Disease

Jaskanwal D. Sara, R. Jay Widmer, Yasushi Matsuzawa, Ryan J. Lennon, Lilach O. Lerman, Amir Lerman

Research output: Contribution to journalArticle

136 Scopus citations

Abstract

Objectives This study assessed the prevalence of coronary microvascular abnormalities in patients presenting with chest pain and nonobstructive coronary artery disease (CAD). Background Coronary microvascular abnormalities mediate ischemia and can lead to an increased risk of cardiovascular events. Methods Using an intracoronary Doppler guidewire, endothelial-dependent microvascular function was examined by evaluating changes in coronary blood flow in response to acetylcholine, whereas endothelial-independent microvascular function was examined by evaluating changes in coronary flow velocity reserve in response to intracoronary adenosine. Patients were divided into 4 groups depending on whether they had a normal (+) or abnormal (-) coronary blood flow (CBF) in response to acetylcholine (Ach) and a normal (+) or abnormal (-) coronary flow velocity reserve (CFR) in response to adenosine (Adn): CBFAch+, CFRAdn+ (n = 520); CBFAch-, CFRAdn+ (n = 478); CBFAch+, CFRAdn- (n = 173); and CBFAch-, CFRAdn- (n = 268). Results Two-thirds of all patients had some sort of microvascular dysfunction. Women were more prevalent in each group (56% to 82%). Diabetes was uncommon in all groups (7% to 12%), whereas hypertension and hyperlipidemia were relatively more prevalent in each group, although rates for most conventional cardiovascular risk factors did not differ significantly between groups. There were no significant differences in the findings of noninvasive functional testing between groups. In a multivariable analysis, age was the only variable that independently predicted abnormal microvascular function. Conclusions Patients with chest pain and nonobstructive CAD have a high prevalence of coronary microvascular abnormalities. These abnormalities correlate poorly with conventional cardiovascular risk factors and are dissociated from the findings of noninvasive functional testing.

Original languageEnglish (US)
Article number2114
Pages (from-to)1445-1453
Number of pages9
JournalJACC: Cardiovascular Interventions
Volume8
Issue number11
DOIs
StatePublished - Sep 1 2015

Keywords

  • coronary microvascular dysfunction
  • endothelial dysfunction
  • nonobstructive coronary artery disease

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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