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Intensive medical treatment failed to reduce major adverse cardiovascular events in women with suspected ANOCA/INOCA over 2.5 yearsIntensive heart medication did not reduce major events in women with suspected ANOCA

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Key Takeaway
Note that limited power prevents concluding intensive medical treatment is ineffective for women with suspected ANOCA/INOCA.

This randomized controlled trial evaluated the efficacy of intensive medical treatment (IMT) versus usual care (UC) in women with suspected ANOCA/INOCA (angina due to suspected ischemia with no obstructive coronary artery disease). The study was conducted across 71 sites in the USA, enrolling a total sample size of 2,476 women. The population consisted of patients with a mean age of 64 years who presented with well-controlled blood pressure and low-density lipoprotein cholesterol levels at baseline. Recruitment for the trial was lower than originally planned, which impacted the overall statistical power of the analysis.

The intervention arm received intensive medical treatment comprising high-intensity statin therapy, an ACE inhibitor (ACEi) or angiotensin receptor blocker (ARB), and aspirin. The comparator group received usual care. At baseline, relatively high rates of statin and ACEi/ARB use were already present in the study population, which may have influenced the observed outcomes. The primary outcome was defined as major adverse cardiovascular event (MACE), a composite endpoint including all-cause death, myocardial infarction, stroke or transient ischemic attack, and hospitalization for angina or heart failure. Secondary outcomes included the individual components of the primary outcome, quality of life, and a win ratio.

Follow-up for the primary outcome analysis was 2.5 years. During this period, a total of 421 MACE events occurred. Of these, 221 events were observed in the IMT group and 200 events in the UC group. The hazard ratio for MACE in the IMT group versus the UC group was 1.13, with a 95% confidence interval ranging from 0.94 to 1.37. The p-value for this comparison was 0.20, indicating no statistically significant difference between the two groups. Consequently, intensive medical treatment did not improve primary outcomes compared to usual care in this cohort.

Regarding secondary outcomes, no significant differences were reported between the IMT and UC groups. Specific effect sizes, absolute numbers, and p-values for these secondary endpoints were not reported in the available data. Safety and tolerability findings, including rates of adverse events, serious adverse events, discontinuations, and general tolerability, were not reported in the study results. A sensitivity analysis addressing potential contamination yielded an estimated hazard ratio of 0.74 for IMT versus UC, with a 95% confidence interval of 0.352 to 1.558 and a p-value of 0.43.

Several methodological limitations must be considered when interpreting these results. The study population was characterized by an aged demographic with well-controlled cardiovascular risk factors at baseline, which may limit generalizability to patients with more aggressive disease profiles. The high baseline use of statins and ACEi/ARBs suggests that the incremental benefit of the intensive regimen was tested in a setting where standard therapies were already widely adopted. Crucially, the limited power of the study precludes concluding that intensive medical treatment may not be helpful; the absence of a significant difference could be due to insufficient sample size rather than a true lack of effect.

These findings support the need for further investigation in this population, which bears a high burden of angina hospitalization, significant health resource consumption, and poor quality of life. The results do not currently support the routine addition of intensive medical treatment beyond usual care for women with suspected ANOCA/INOCA based on this trial alone. Further research is required to determine if specific subgroups or different treatment intensities might yield different outcomes. Clinicians should interpret these results with caution, acknowledging the uncertainty regarding the potential utility of IMT in this specific clinical context.

Key questions remain unanswered regarding the optimal management strategies for women with suspected ANOCA/INOCA who do not respond to standard therapies. The lack of reported safety data limits the ability to fully assess the risk-benefit profile of the intensive regimen in this specific population. Future studies should aim to address the limitations of this trial, including the baseline characteristics of the participants and the statistical power to detect modest treatment effects.

Many women suffer from severe chest pain that feels like a heart attack, yet doctors cannot find any blockages in their heart arteries. This confusing condition is called suspected ANOCA or INOCA. For these patients, the pain is real, but standard blockage-clearing surgeries often do not help. This large study looked at whether giving these women a very aggressive medical plan could stop the pain and prevent serious heart events. The researchers wanted to know if pushing harder with medication made a difference for women facing this difficult diagnosis.

The team gathered 2,476 women from 71 different hospitals across the United States. Half of the women received an intensive medical treatment plan, while the other half received usual care. The intensive plan included high doses of statins to lower cholesterol, ACE inhibitors or ARBs to manage blood pressure, and aspirin to prevent clots. The usual care group received the standard medications doctors typically prescribe for heart health. Both groups also received advice on lifestyle changes like diet and exercise.

The women followed this plan for two and a half years. The main goal was to see if the intensive group had fewer major heart events, such as death, heart attack, stroke, or hospital stays for heart failure. The study found no difference between the two groups. In the intensive group, 221 women had a major event. In the usual care group, 200 women had a major event. The numbers were very close, showing that the extra medications did not provide extra protection.

Safety was also checked during the study. The report did not list any specific side effects or reasons why patients stopped taking their medicines. Because the study did not find a difference in outcomes, there were no safety concerns raised about the intensive treatment plan itself. The medications used are common and generally well-tolerated, but this study did not report specific issues like muscle pain or low blood pressure that might occur with high doses.

It is important not to jump to conclusions based on this single study. The researchers admitted that fewer women joined the study than they had planned, which makes the results less certain. The group was also older, with an average age of 64, and their blood pressure and cholesterol were already well-controlled before the study started. Because of these factors, the study did not have enough power to prove that the intensive treatment is definitely not helpful. It simply showed that it did not help in this specific group.

For patients right now, this study means that doctors should not stop using standard heart medications just because of these results. However, it also suggests that we cannot assume that a more aggressive approach will automatically work for everyone with this condition. More investigation is needed to find the best way to help women with suspected ANOCA or INOCA who suffer from a high burden of hospital visits and poor quality of life. Until more evidence is available, the best approach remains a careful balance of proven treatments and individual patient needs.

What this means for you:
Intensive meds did not reduce heart events in this group, but more research is needed.

Study Details

Study typeRct
Sample sizen = 2,476
EvidenceLevel 2
Follow-up768.0 mo
PublishedApr 2026
View Original Abstract ↓
IMPORTANCE: Women with angina due to suspected ischaemia referred for coronary angiography often have no obstructive coronary artery disease (ANOCA/INOCA). OBJECTIVE: To determine if intensive medical treatment (IMT) reduces major ischaemic events (major adverse cardiovascular event, MACE) among women with suspected ANOCA/INOCA. DESIGN: Randomised, prospective, blinded-outcomes evaluation. SETTING: 71 sites in the USA. PARTICIPANTS: 2476 women with suspected ANOCA/INOCA. INTERVENTIONS: IMT-high intensity statin, ACE inhibitor (ACEi) or angiotensin receptor blocker (ARB) and aspirin versus usual care (UC). MAIN OUTCOMES AND MEASURES: Primary: all cause death, myocardial infarction, stroke/transient ischaemic attack, hospitalisation for angina or heart failure (MACE). Secondary: components of the primary, quality of life and win ratio. RESULTS: Recruitment was lower than planned (n=2476), yielding an aged population (mean, 64 years) with well-controlled blood pressure and low-density lipoprotein cholesterol at baseline, and relatively high rates of statin and ACEI/ARB use. At 2.5 years, 421 events occurred (221 in IMT, 200 in UC) with no difference in the primary outcome (HR=1.13 (95% CI 0.94 to 1.37) for IMT vs UC, p=0.20) or secondary outcomes. Hospitalisations for angina were the dominant contributor to MACE. Sensitivity analysis of contamination provided an estimated HR for IMT versus UC of 0.74 95% CI (0.352 to 1.558), p=0.43. CONCLUSIONS AND RELEVANCE: Among women with suspected ANOCA/INOCA, outcomes were dominated by chest pain and IMT did not improve outcomes, although limited power precludes concluding that it may not be helpful. The findings support the need for more investigation in this population with high burden of angina hospitalisation, health resource consumption and poor quality of life. TRIAL REGISTRATION NUMBER: NCT03417388.
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