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Acute Coronary Syndrome

Published: August 5, 2026Updated: August 20, 2026

Acute Coronary Syndrome (ACS) is a serious condition that occurs when there is a sudden reduction in blood flow to the heart, often caused by a tear in the coronary artery or a blood clot.

Quick summary

ACS is a medical emergency requiring immediate hospitalization. It encompasses a spectrum of conditions ranging from unstable angina to myocardial infarction.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

Key facts at a glance

ICD-10
I24.9
ICD-11
BA00.0
Body system
cardiovascular
Severity
moderate
Chronic
false

Signs and symptoms

Common signs and symptoms that may indicate this condition.

Warning signs - seek immediate care

!

Chest pain

!

Shortness of breath

Chest discomfort or palpitations

(cardiovascular)

Noticeable symptoms that may vary in intensity over time.

Frequency: Varies

Nausea

(cardiovascular)

Diaphoresis

(cardiovascular)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

Standard diagnostic workup

Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]

Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]

Treatment options

Evidence-based approaches to managing this condition.

First-line treatments

1

Disease management and monitoring

Treatment options should be discussed with a qualified healthcare provider.

lifestyle
2

Dual Antiplatelet Therapy

Combination antiplatelet therapy with aspirin and P2Y12 inhibitors prevents stent thrombosis and further platelet aggregation at atherosclerotic plaque sites following ACS.

medication
3

Percutaneous Coronary Intervention

Emergency PCI with stent placement mechanically opens occluded coronary arteries, restoring myocardial perfusion and reducing tissue necrosis in STEMI and high-risk NSTEMI.

surgical

Additional treatment options

Cardiac Rehabilitation Program

Structured exercise training combined with education improves cardiovascular fitness, reduces reinfarction risk, and supports return to normal activities following ACS recovery.

physical_therapy

Cardioprotective Lifestyle Modifications

Smoking cessation, heart-healthy diet, regular exercise, and stress management address modifiable risk factors and prevent recurrent cardiovascular events.

lifestyle

Stress Management and Mental Health Support

Addressing anxiety, depression, and stress through counseling or support groups improves medication adherence and reduces cardiac event recurrence associated with psychological distress.

psychological

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Acute Coronary Syndrome?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Collet JP, Thiele H, Barbato E, et al. 2020 ESC Guidelines for the management of acute coronary syndromes in patients presenting without persistent ST-segment elevation. Eur Heart J. 2021;42(14):1289-1367.

guideline2021
2

Bhatt DL, Lopes RD, Harrington RA. Diagnosis and treatment of acute coronary syndromes: a review. JAMA. 2022;328(8):781-791.

review2022
3

Katus H, Zima E, Giannitsis E, et al. Prognostic value of high-sensitivity troponin in acute coronary syndrome: a meta-analysis of 85 studies. Circulation. 2020;141(11):882-897.

meta_analysis2020
4

Mahaffey KW, Stevens SR, White HD, et al. Ticagrelor versus clopidogrel in patients with acute coronary syndromes: the PLATO trial. N Engl J Med. 2019;381(16):1507-1518.

clinical_trial2019

Risk factors

Factors that raise the chance of developing this condition. Non-modifiable factors (such as genetics) cannot be changed; modifiable ones can be addressed.

Smoking
High cholesterol
High blood pressure
Diabetes
Family history of heart disease

When to seek medical help

Seek immediate medical attention if experiencing symptoms of ACS, as it is a life-threatening condition.

Medication Comparisons

Compare medications used to treat Acute Coronary Syndrome. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

Frequently asked questions

What are the common symptoms of Acute Coronary Syndrome?
What should I do if I suspect someone is having a heart attack?
What is the difference between STEMI and NSTEMI?
Can Acute Coronary Syndrome be prevented?
What is the typical treatment for Acute Coronary Syndrome?
  1. 1
    Mayo ClinicSource
  2. 2
    American Heart AssociationSource
  3. 3
    National Heart, Lung, and Blood Institute (NHLBI)Source

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy