Key Points
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Coronary microvascular dysfunction (CMD) can present as chest pain with electrocardiographic changes and/or imaging abnormalities on stress testing, but no or nonobstructive coronary artery disease on angiography
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CMD is an under-recognized and underdiagnosed condition that is associated with an increased incidence of adverse cardiac events
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Risk factors for CMD seem to be similar to those for coronary artery disease, including hypertension, hyperlipidaemia, oestrogen deficiency in women, hyperglycaemia, chronic inflammation, and ageing; however, these factors do not fully account for the prevalence of CMD
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CMD can be diagnosed using invasive angiography techniques, and novel noninvasive techniques (such as PET, transthoracic Doppler echocardiography, and cardiac MRI) are increasingly available
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Supported by data from intermediate-outcome trials, treatment for CMD includes antiatherosclerotic and antianginal therapy, but trials to assess major adverse outcomes (such as death and myocardial infarction) are necessary
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Most studies of CMD have focused on women; further evaluation is needed in men
Abstract
Cardiovascular disease is the leading cause of death worldwide. In the presence of signs and symptoms of myocardial ischaemia, women are more likely than men to have no obstructive coronary artery disease (CAD). Women have a greater burden of symptoms than men, and are often falsely reassured despite the presence of ischaemic heart disease because of a lack of obstructive CAD. Coronary microvascular dysfunction should be considered as an aetiology for ischaemic heart disease with signs and symptoms of myocardial ischaemia, but no obstructive CAD. Coronary microvascular dysfunction is defined as impaired coronary flow reserve owing to functional and/or structural abnormalities of the microcirculation, and is associated with an adverse cardiovascular prognosis. Therapeutic lifestyle changes as well as antiatherosclerotic and antianginal medications might be beneficial, but clinical outcome trials are needed to guide treatment. In this Review, we discuss the prevalence, presentation, diagnosis, and treatment of coronary microvascular dysfunction, with a particular emphasis on ischaemic heart disease in women.
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Acknowledgements
The authors were supported by funding from the National Heart, Lung, and Blood Institute, numbers N01-HV-68161, N01-HV-68162, N01-HV-68163, and N01-HV-68164; grants K23HL105787, U0164829, U01 HL649141, U01 HL649241, T32HL69751, R01 HL090957, and 1R03AG032631 from the National Institute on Aging; GCRC grant MO1-RR00425 from the National Center for Research Resources; and grants from the Gustavus and Louis Pfeiffer Research Foundation, Danville, NJ, USA; The Women's Guild of Cedars-Sinai Medical Center, Los Angeles, CA, USA; The Ladies Hospital Aid Society of Western Pennsylvania, Pittsburgh, PA, USA; QMED, Inc., Laurence Harbor, NJ, USA; the Edythe L. Broad Women's Heart Research Fellowship; the Barbra Streisand Women's Cardiovascular Research and Education Program; and the Linda Joy Pollin Women's Heart Health Program, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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P.K.M. has received research support from General Electric and Gilead, and has given lectures for the Medical Education Speakers Network (paid to Cedars-Sinai Medical Center). C.N.B.M. has given Continuing Medical Education lectures for Allegheny General Hospital, AHA, Bryn Mawr, Duke University, Emory University, Garden State, Gilead (Grant Review Committee), Japanese Circulation Society, Kaiser Permanente, Mayo Foundation, Preventive Cardiovascular Nurses Association, Practice Point Communications, University of California San Francisco, and Vox Media (paid to Cedars-Sinai Medical Center). C.N.B.M. has also received honoraria and consulting fees from NIH-SEP (Grant Review Study Section), Research Triangle Institute International, University of New Mexico, and Victor Chang Cardiac Research Institute; and has received research support from the Clinical Translational Science Institute, Flight Attendant Medical Research Institute, Gilead, and NIH. J.D. and S.D.C. declare no competing interests.
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Dean, J., Cruz, S., Mehta, P. et al. Coronary microvascular dysfunction: sex-specific risk, diagnosis, and therapy. Nat Rev Cardiol 12, 406–414 (2015). https://doi.org/10.1038/nrcardio.2015.72
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DOI: https://doi.org/10.1038/nrcardio.2015.72
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