Cardiac Enzyme Tests

Rapid Blood Tests to Detect Heart Injury

Cardiac Enzyme Test Details

Troponin

Troponin is a protein released into the blood when the heart muscle is damaged. Elevated troponin levels are a key marker of heart attack or acute cardiac injury and help physicians quickly diagnose and assess the severity of heart-related events.

CK-MB (Creatine Kinase-MB)

CK-MB is an enzyme found primarily in heart muscle. Increased CK-MB levels may indicate heart muscle damage and are often used alongside troponin testing to confirm or rule out myocardial injury.

Total Creatine Kinase (CK)

Creatine kinase is an enzyme present in the heart, brain, and skeletal muscles. Elevated CK levels may signal muscle damage, including cardiac injury, and help differentiate heart-related causes from other muscle conditions.

Myoglobin

Myoglobin is a protein released rapidly into the bloodstream after muscle injury, including damage to heart muscle. Elevated myoglobin levels can provide early indication of cardiac injury but are typically interpreted with other cardiac markers.

BNP (B-Type Natriuretic Peptide)

BNP is a hormone released by the heart in response to increased pressure or strain. Elevated BNP levels may indicate heart failure or fluid overload and help assess heart function and treatment needs.

Open 24/7 For Emergencies

Conditions We Evaluate With a Cardiac Enzyme Test

Severe Cases

These emergencies are potentially life-threatening and often require immediate evaluation, continuous monitoring, and possible inpatient care.

Heart Attack

Heart muscle damage caused by blocked blood flow is detected through elevated troponin levels. Rapid testing allows for early intervention to prevent further injury or death.

Acute Coronary Syndrome

Includes unstable angina and heart attacks. Cardiac enzyme tests help confirm diagnosis in patients presenting with chest pain or other urgent symptoms.

Pulmonary Embolism with Cardiac Strain

Blood clots in the lungs can stress the heart and cause enzyme elevation. Testing guides urgent care decisions and monitoring.

Severe Hypertensive Crisis

Extremely high blood pressure can damage the heart. Cardiac enzyme testing evaluates whether myocardial injury has occurred, supporting rapid intervention.

Open 24/7 For Emergencies

Moderate to Severe Cases

These conditions may require observation, repeat testing, or short-term inpatient care depending on symptom severity and enzyme trends.

Unexplained Chest Discomfort

Pressure, tightness, or atypical pain may indicate evolving heart injury. Serial enzyme testing detects cardiac involvement early.

Rapid or Irregular Heartbeat with Symptoms

Palpitations accompanied by dizziness, shortness of breath, or mild chest pain may reflect myocardial stress, prompting enzyme evaluation.

Heart Failure Exacerbation

Elevated enzymes may indicate increased strain on the heart, helping physicians adjust treatment and monitor progression.

Suspected Myocarditis

Inflammation of the heart muscle may elevate troponin. Testing supports diagnosis when patients present with fatigue, chest pain, or viral-like symptoms.

Open 24/7 For Emergencies

Mild to Moderate Cases

These conditions are generally non-emergent but benefit from testing to detect early or subtle cardiac injury.

Intermittent Chest Discomfort

Occasional chest pressure, especially in patients with risk factors, can be evaluated to rule out early myocardial injury.

Shortness of Breath on Exertion

Exercise-induced breathlessness may indicate heart stress. Cardiac enzyme tests help differentiate cardiac from lung or metabolic causes.

Palpitations Without Severe Symptoms

Occasional rapid or irregular heartbeat without chest pain or dizziness can warrant testing to detect subclinical heart stress.

Routine Cardiac Risk Monitoring

Patients with known risk factors or mild symptoms may undergo enzyme testing to track heart health and detect early injury before serious events occur.

Open 24/7 For Emergencies

The Advantage of Elite Care

At St. Michael’s Elite Hospital, cardiac emergencies are evaluated with the same advanced diagnostics found in major hospital ERs—without the long waits.

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Seen Within Minutes

Patients are evaluated promptly, with average ER wait times under 10 minutes, ensuring urgent cardiac concerns are addressed immediately.

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Rapid Cardiac Enzyme Results

Our lab delivers fast, accurate cardiac enzyme test results, giving doctors critical information quickly to guide immediate treatment decisions.

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Observation Without Overcrowding

Private, comfortable observation rooms provide careful cardiac monitoring without the stress or delays caused by overcrowded emergency departments.

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Adult & Pediatric Expertise

Our experienced team provides expert emergency cardiac care for adults and children, covering a wide range of heart-related concerns.

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Transparent Billing

We provide clear, upfront billing and easy-to-understand explanations, so patients face no surprises regarding cardiac emergency services costs.

St. Michael’s Elite Hospital

Transparent Billing & Insurance

St. Michael’s Elite Hospital accepts all private insurance plans. Even as an out-of-network provider, federal and Texas law require insurers to cover emergency care at in-network levels.
You may receive an Explanation of Benefits (EOB) from your insurer — this is not a bill. We will never send surprise bills, and you won’t owe anything until your claim is fully processed. Separate bills may come from physicians or specialists.
Patients without insurance can receive a free medical screening examination and access discounted prompt-pay rates. We comply with EMTALA, ensuring all patients with acute symptoms receive immediate care, regardless of coverage or ability to pay.
If you have a concern about your care, please contact our Senior Patient Advocate at 512-234-1081.

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Areas We Serve In Sugar Land

While we’ve listed some local neighborhoods, our services are available throughout the area, ensuring 24/7 access to expert ER treatment whenever you need it.

First Colony

Sweetwater

Riverstone

Avalon

Greatwood

Lake Pointe

New Territory

Riverpark