Angina pectoris—commonly referred to simply as angina—is chest pain that occurs when the heart muscle does not receive enough oxygen-rich blood. While most episodes occur during physical exertion or emotional stress, angina can also develop in the dental office, particularly during treatment performed under sedation.

Sedation may reduce a patient's ability to recognize or clearly communicate symptoms, and certain stressors associated with dental care can increase cardiac workload. For this reason, dental teams must be prepared to identify early warning signs and respond promptly.

This review outlines the physiology of angina, risk factors relevant to dental care, how sedation influences detection and management, and the steps necessary to prevent and treat angina in the clinical setting.

Physiology of Angina Pectoris

Angina results from a temporary imbalance between the heart’s demand for oxygen and the supply it receives through the coronary arteries. In most cases, this mismatch is caused by atherosclerotic narrowing of the coronary vessels. When demand increases—such as during stress, anxiety, hypertension, or tachycardia—the restricted arteries cannot deliver enough oxygen, leading to ischemic chest discomfort.

A typical anginal episode lasts several minutes and is often described as pressure, heaviness, tightness, or squeezing in the chest. It may radiate to the jaw, neck, shoulder, or arm. Nitroglycerin usually provides relief by dilating coronary vessels and reducing cardiac workload.

Why Angina May Occur During Dental Treatment

Dental appointments can produce multiple physiologic and psychological stressors, including:

Anxiety or fear, which increases sympathetic tone, elevating heart rate and blood pressure.
Pain or procedural stimulation, especially if local anesthesia is inadequate.
Use of epinephrine-containing anesthetics, which may increase myocardial oxygen demand.
Positioning changes, which can influence cardiovascular stability.
Dehydration or fasting prior to sedation.

Under sedation, some stressors may be reduced, but others become more significant. For example, reduced communication may delay recognition of discomfort, and medications can alter cardiovascular response.

Sedation and Its Influence on Angina Risk

Sedation modifies the presentation and detectability of angina in several ways:

Blunted symptom reporting

A sedated patient may not fully perceive or verbalize chest pain, making physiologic cues especially important.

Hemodynamic effects

Sedative drugs may cause fluctuations in blood pressure or heart rate—either increases (from stress or inadequate analgesia) or decreases (from drug effects). Sudden changes can provoke ischemia in vulnerable patients.

Masking of nonverbal signs

Lethargy, reduced responsiveness, or labored breathing might be mistaken for deeper sedation rather than cardiac distress if clinicians are not attentive.

Because of these variables, continuous monitoring and vigilance are essential when caring for patients with known cardiovascular disease.

Recognition of Angina During Sedation

Even when the patient cannot describe chest pain clearly, angina may present through subtle or indirect signs. These may include:

Restlessness or sudden anxiety
Facial pallor or cool, clammy skin
Changes in breathing pattern
Mild shortness of breath
Elevated blood pressure or heart rate
Complaints of “pressure,” “fullness,” or discomfort in the chest, neck, or jaw
Delayed verbal responsiveness

These early indicators should prompt immediate evaluation and, if needed, termination of the procedure.

Prevention Strategies

Preventing angina during dental treatment begins before the patient enters the operatory. Key prevention strategies include:

Thorough medical history and risk stratification

Patients with known ischemic heart disease, history of angina, recent myocardial infarction, or cardiac interventions require careful assessment. Consultation with the patient’s physician may be advisable for unclear or unstable conditions.

Stress reduction protocols

A welcoming environment, good communication, pre-appointment planning, and slow, supportive induction of sedation help reduce anxiety-driven cardiac stress.

Adequate pain control

Using appropriate local anesthesia—and supplementing when needed—minimizes nociceptive triggers of ischemia.

Judicious use of vasoconstrictors

Epinephrine in local anesthetics should be used cautiously in patients with unstable angina or significant cardiovascular disease.

Continuous monitoring

Pulse oximetry, blood pressure measurement, and ECG or capnography (if available) enhance early detection of physiologic changes.

Management of Angina During Dental Treatment

If angina is suspected:

Stop the procedure immediately
Discontinue treatment and remove instruments from the mouth.
Position the patient comfortably
Usually upright or semi-reclined to decrease cardiac workload.
Administer oxygen
Supplemental oxygen helps alleviate ischemia and support cardiac function.
Give nitroglycerin (if appropriate)
One sublingual tablet or spray dose may be administered, provided the patient’s blood pressure is adequate and they are not hypotensive. Additional doses may follow per medical guidance.
Monitor vitals continuously
Observe changes in blood pressure, heart rate, oxygen saturation, and responsiveness.
Assess for improvement within minutes
Classic angina typically resolves promptly with nitroglycerin and rest. If symptoms persist:
Activate emergency medical services (EMS)
Persistent or worsening symptoms may indicate unstable angina or myocardial infarction. Early activation of EMS is critical.
Prepare for potential complications
Be ready for advanced cardiac life support if the patient deteriorates.

Post-Event Considerations

Any anginal episode during dental treatment warrants medical follow-up. Even if symptoms resolve quickly, the dentist should advise the patient to inform their physician to reassess cardiac stability. Future treatments may require modified sedation plans or a hospital-based setting.

Conclusion

Angina pectoris during dental treatment under sedation, while uncommon, represents a serious and time-sensitive complication. Understanding the underlying physiology, recognizing early warning signs, and implementing strong prevention and management practices can significantly reduce patient risk. With thoughtful planning and prompt response, dental teams can provide safe, effective care to individuals with cardiovascular disease.

Angina Pectoris