Imagine being dismissed with a clean bill of health for your chest pain, only to discover it could still signal a genuine heart problem—new research suggests that up to half of angina diagnoses might be completely off the mark! This eye-opening revelation comes from a groundbreaking study on stress cardiac MRI, a test that could revolutionize how we spot and treat this common ailment. But here's where it gets intriguing: even when traditional scans show wide-open arteries, hidden issues might be lurking. Stick around, because most people overlook this subtle but crucial distinction that could change your health outlook forever.
Heart illustration with magnification of the artery
© American Heart Association
News • Blood flow measurement
In a startling discovery, researchers found that 50% of individuals cleared of angina might have been incorrectly diagnosed. Chest discomfort can absolutely stem from angina, even if coronary angiogram scans indicate the primary heart arteries are unobstructed. Incorporating stress cardiac MRI to assess blood flow throughout the heart seems to enhance accuracy in identifying the condition and boost patients' overall well-being. These insights were unveiled during a cutting-edge science session at the American Heart Association’s Scientific Sessions 2025, held from November 7-10 in New Orleans.
Colin Berry, M.B.Ch.B., Ph.D., professor of cardiology at the University of Glasgow and consultant at Golden Jubilee University National Hospital
© University of Glasgow
“Individuals can experience legitimate angina despite the major arteries appearing fully patent,” explained study lead Colin Berry, M.B.Ch.B., Ph.D., a cardiology professor at the University of Glasgow and a consultant at Golden Jubilee University National Hospital. “Through evaluating blood circulation via a stress cardiac MRI, we uncovered that microvascular issues are widespread. Our data demonstrates that relying solely on an angiogram isn't sufficient to account for chest discomfort. A practical assessment of blood flow ought to be incorporated prior to discharging patients, particularly women, who are disproportionately affected by unrecognized small vessel angina.”
To help newcomers grasp this, angina is essentially chest pain that flares up when the heart doesn't receive adequate oxygen-laden blood—think of it like your heart signaling distress because its fuel supply is running low. Per the American Heart Association, roughly half of angina sufferers tested via coronary angiogram show no significant coronary artery blockages. This investigation set out to explore whether stress cardiac MRI—a non-invasive heart imaging technique using magnetic resonance to gauge blood flow—could refine detection and management for those with potential angina.
The CorCMR trial recruited 250 grown-ups experiencing chest pain without visible coronary blockages from prior tests. Each had undergone a coronary angiogram within three months before joining, confirming suspected angina without obstructive coronary artery disease (ANOCA). Participants were split randomly into two cohorts. Both underwent stress cardiac MRI, but in one group, results were revealed to physicians and patients to inform care plans. In the other, MRI findings remained undisclosed, with decisions hinging solely on the initial angiogram. Neither the subjects nor their doctors were aware of group assignments until the 12-month study concluded.
Clinical practice ought to evolve to incorporate stress cardiac MRI for angina evaluation, particularly among women reporting chest pain without major arterial obstructions
Tracking everyone for a minimum of 12 months revealed:
- Roughly half of all enrollees (53%) saw their diagnosis revised following the stress cardiac MRI.
- About 1 in 2 individuals suffered chest pain due to tiny heart vessels (microvascular angina); nearly half (48%) had non-cardiac chest pain; and a small fraction (2%) dealt with alternative issues like heart muscle swelling (myocarditis) or enlarged heart muscle (hypertrophic cardiomyopathy).
- Upon reviewing stress cardiac MRI visuals, around 1 in 2 participants were identified with microvascular angina, versus less than 1 in 100 relying only on angiograms.
- Over half of microvascular angina cases occurred in women.
- At six and twelve months, participants completed the Seattle Angina Questionnaire, a standard 19-item tool measuring physical activity limits, pain frequency and intensity, and life quality (including satisfaction with care and perception of illness).
- Life quality metrics rose notably in the stress cardiac MRI arm, showing modest gains at six months that grew stronger by year-end.
** Those in the stress cardiac MRI cohort saw average improvements of 18 points at six months and 22 points at one year on the questionnaire.
** The angiogram-only group advanced by fewer than 1 point.
** By the study's close, the gap between groups widened to approximately 21 points.
- No serious adverse events emerged from the stress cardiac MRI, with zero fatalities over the follow-up period.
“This research paves a fresh avenue for chest pain sufferers,” Berry remarked. “It highlights that relying exclusively on angiograms leads to poorer symptoms and health. Healthcare routines should adapt to include stress cardiac MRI for angina, especially for females with chest pain and clear main arteries. These outcomes could shape upcoming guidelines for angina cases, ultimately enhancing patient results.”
Study details, background and design:
- From 273 screened candidates, 250 adults participated, averaging 63 years old, with roughly equal gender split and about 1 in 6 having Type 2 diabetes (a condition where the body struggles to regulate blood sugar, often linked to heart risks). Each had a recent angiogram confirming patent main arteries without blockages.
- All then received a stress cardiac MRI to quantify arterial blood flow, with a drug administered to simulate exercise's impact on the heart during scanning.
- Random assignment placed participants in groups where either MRI data guided diagnoses and therapies, or decisions rested on angiograms alone. Blinding ensured no prior knowledge of assignments.
- Recruitment started in February 2021, with follow-up in 2024, across three Scottish hospitals.
- Full 12-month monitoring occurred without any withdrawals.
- An impartial trials unit oversaw coordination, central data gathering, and analysis by a blinded statistician to reduce bias.
The study does have constraints to consider. Additional investigations are essential to validate these results across varied healthcare environments and assess long-term patient benefits, like reduced readmissions or better survival. Since microvascular chest pain is frequently missed, particularly in women and underrepresented demographics, upcoming studies should prioritize diverse inclusion.
To put this in perspective, chest pain ranks as the second-leading cause of emergency department visits in the U.S. after injuries, totaling over 6.5 million annually (roughly 1 in 20 ED cases). It also triggers nearly four million outpatient appointments yearly, as per the American Heart Association’s Heart Disease and Stroke Statistics – 2025 Update.
But here's where it gets controversial: This study boldly challenges the status quo by suggesting that angiograms—the long-standing gold standard for heart scans—might not be foolproof, especially for women who could be facing invisible threats in smaller vessels. Is this a wake-up call for gender biases in cardiology, or are we overcomplicating diagnosis with yet another test? And this is the part most people miss: Microvascular angina, often dismissed, might be the hidden culprit in many 'cleared' cases. Could widespread adoption of stress cardiac MRI prevent unnecessary suffering, or does it risk unnecessary procedures and costs? We invite you to weigh in—what are your thoughts on making this the new norm for angina? Have you heard stories of misdiagnosed chest pain, or do you believe current methods suffice? Share your opinions in the comments below and let's discuss!
Source: American Heart Association
12.11.2025
