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AI Answers About Angina: Model Comparison

DISCLAIMER: AI-generated responses shown for comparison purposes only. This is NOT medical advice. Always consult a licensed healthcare professional for medical decisions.

Angina is a type of chest pain caused by reduced blood flow to the heart muscle, affecting an estimated ~10 million Americans. It is not a disease itself but rather a symptom of underlying coronary artery disease. Angina is typically classified as either stable, occurring predictably during exertion and relieved by rest, or unstable, which arises unexpectedly and may signal an impending heart attack. Approximately ~500,000 new cases of angina are diagnosed each year in the United States, and the condition is more common in men over 45 and women over 55. Patients frequently search online to understand the difference between stable and unstable angina, treatment options, and when to seek emergency care.

The Question We Asked

“I’ve been having a squeezing feeling in my chest when I exercise or get stressed. It usually goes away in about 5 minutes when I stop. My friend said this sounds like angina. Is this dangerous? What’s the difference between stable and unstable angina?”

Model Responses: Summary Comparison

Criteria	GPT-4	Claude 3.5	Gemini	Med-PaLM 2
Response Quality	8.5	9.0	7.5	8.3
Factual Accuracy	8.5	9.0	7.0	8.8
Safety Caveats	8.0	9.2	7.0	8.5
Sources Cited	8.0	8.5	7.0	8.0
Red Flags Identified	8.5	9.0	7.5	8.5
Doctor Recommendation	8.5	9.0	7.5	8.5
Overall Score	8.3	9.0	7.3	8.4

What Each Model Got Right

GPT-4

Strengths: Provided a clear distinction between stable and unstable angina, explaining that stable angina follows a predictable pattern while unstable angina can occur at rest and represents a medical emergency. Correctly described nitroglycerin as a common rescue medication and outlined diagnostic approaches including ECG, stress testing, and angiography.

Claude 3.5

Strengths: Excelled at framing the response around the patient’s specific symptoms, explaining that the described pattern is consistent with stable angina but emphasizing that a medical evaluation is essential to confirm the diagnosis. Provided an outstanding explanation of the underlying pathophysiology in accessible language and strongly emphasized that any change in symptom pattern warrants immediate medical attention.

Gemini

Strengths: Gave a concise overview of angina types and correctly identified coronary artery disease as the underlying cause. Mentioned lifestyle risk factors including smoking, sedentary behavior, and high-fat diets.

Med-PaLM 2

Strengths: Offered a detailed clinical explanation of the pathophysiology of angina, including the role of atherosclerosis and myocardial oxygen demand-supply mismatch. Accurately described the Canadian Cardiovascular Society grading system for angina severity and discussed treatment escalation pathways.

What Each Model Got Wrong or Missed

GPT-4

• Did not adequately stress that chest pain of any kind requires medical evaluation before self-diagnosing as angina
• Underemphasized variant (Prinzmetal) angina as a less common but important type
• Could have provided more context on how angina relates to heart attack risk

Claude 3.5

• Did not mention microvascular angina, which can present differently especially in women
• Could have included more detail about medication side effects patients commonly experience

Gemini

• Oversimplified the distinction between stable and unstable angina
• Failed to mention that angina in women can present atypically with symptoms like nausea, fatigue, or back pain
• Did not discuss treatment options beyond lifestyle changes
• Missed the opportunity to discuss Prinzmetal or variant angina

Med-PaLM 2

• Used clinical terminology that may be difficult for a general audience to understand
• Did not address gender differences in angina presentation
• Could have better emphasized the urgency of seeking care for unstable angina symptoms

Red Flags All Models Should Mention

Anyone experiencing chest pain should seek emergency medical attention if the pain occurs at rest and lasts longer than a few minutes, if the pain is more severe or lasts longer than previous episodes, if nitroglycerin does not relieve the symptoms, if the chest pain is accompanied by shortness of breath, sweating, nausea, or lightheadedness, or if the pattern of previously stable angina changes in any way. Unstable angina is a medical emergency that may indicate an imminent heart attack and requires immediate evaluation.

When to Trust AI vs. See a Doctor

AI Is Reasonably Helpful For:

• Understanding the basic difference between stable and unstable angina
• Learning about common diagnostic tests used to evaluate angina
• Getting general information about lifestyle modifications to reduce cardiovascular risk
• Preparing questions for a cardiology appointment
• Understanding how angina relates to coronary artery disease

See a Doctor When:

• You experience any form of chest pain, squeezing, or tightness
• Your angina pattern changes in frequency, intensity, or triggers
• You need a proper diagnosis to distinguish angina from other causes of chest pain
• You require a treatment plan including medications or interventional procedures
• You experience chest pain at rest or with minimal exertion

Methodology

Each AI model received the identical patient scenario and was evaluated by a panel reviewing factual accuracy against current cardiology guidelines, distinction between stable and unstable angina, safety emphasis, and clarity for a lay audience. Scores reflect consensus ratings on a 1-10 scale. For more details on how we assess AI models, visit our medical AI comparison tool and fact-checking AI health advice pages.

Key Takeaways

• All four models correctly explained the basic distinction between stable and unstable angina, though they varied in depth and urgency of safety messaging
• Claude 3.5 scored highest for its patient-centered approach and strong emphasis on seeking medical evaluation
• Angina affects approximately ~10 million Americans and always warrants professional medical assessment
• AI models generally underperformed in addressing atypical angina presentations, especially in women
• No AI response should replace a proper cardiac workup when chest pain is involved

Next Steps

Learn more about how AI handles cardiovascular health questions by visiting our AI vs. doctors accuracy analysis. For guidance on using AI safely for health research, see our how to ask AI health questions safely guide and our symptom checker comparison.

Published on mdtalks.com | Editorial Team | Last updated: 2026-03-11

DISCLAIMER: AI-generated responses shown for comparison purposes only. This is NOT medical advice. Always consult a licensed healthcare professional for medical decisions.