Symptom Combination

Blackouts and Dizziness: Causes, Conditions & When to See a Doctor

Early recognition of Cardiac Arrhythmia is critical — treatment initiated at the earliest stage is significantly more effective and prevents long-term complications. Understanding the subtle initial presentations allows patients and clinicians to act before the condition progresses.

→ Blackouts Overview → Dizziness Overview

Possible Causes of Blackouts and Dizziness

Conditions that commonly cause both symptoms together

1Early Cardiac Arrhythmia often produces non-specific symptoms: fatigue, malaise, or mild discomfort
2Early warning signs may include: palpitations, dizziness, shortness of breath, chest pain
3Subclinical changes in blood tests, blood pressure, or weight often precede overt symptoms
4Family history and risk factors increase the probability that vague symptoms represent early Cardiac Arrhythmia
5Screening programmes are designed specifically to detect Cardiac Arrhythmia before symptoms appear
6Core management targets: reducing palpitations, dizziness, shortness of breath and preventing disease progression

Emergency Red Flags

Seek immediate medical attention if you experience any of these

Any of the characteristic symptoms of Cardiac Arrhythmia — even mild — in a high-risk individual

Progressive worsening of early warning signs over weeks

Laboratory abnormalities (e.g., blood sugar, inflammatory markers) without full symptoms

Unexplained weight loss, night sweats, or fatigue persisting >2 weeks

Strong family history of Cardiac Arrhythmia combined with new relevant symptoms

When to See a Doctor

Schedule a medical consultation if you notice these signs

You have risk factors for Cardiac Arrhythmia and develop any of the characteristic early symptoms

Screening tests return borderline or abnormal results

You have a strong family history and have not yet been screened for Cardiac Arrhythmia

Scheduled monitoring appointments — do not skip even when feeling well

Conditions That Cause Both Blackouts and Dizziness

7 conditions are associated with this symptom combination

Cardiac Arrhythmia

Cardiac arrhythmia refers to irregular heart rhythms â€” the heart beats too fast, too slow, or with an irregular pattern. Some arrhythmias are harmless, while others (like atrial fibrillation) significantly increase the risk of stroke and heart failure.

Pulmonary Embolism

Pulmonary embolism is a life-threatening blockage of the pulmonary arteries, usually by clots from deep vein thrombosis. Sudden shortness of breath, chest pain, and rapid heart rate are classic presentations requiring emergency treatment.

Aortic Stenosis

Aortic stenosis is narrowing of the aortic valve opening, restricting blood flow from the heart. It causes exertional chest pain, syncope, and heart failure; valve replacement is required for severe symptomatic disease.

Hypotension (Low Blood Pressure)

Hypotension is defined as blood pressure below 90/60 mmHg, causing dizziness, fainting, and fatigue. Causes include dehydration, prolonged standing (orthostatic hypotension), heart problems, and certain medications.

Atrial Fibrillation

Atrial fibrillation (AFib) is the most common cardiac arrhythmia, characterized by rapid and irregular atrial beating. It significantly increases stroke and heart failure risk.

Cardiac Tamponade

Cardiac tamponade is a life-threatening emergency where fluid accumulates in the pericardial sac, compressing the heart and impairing its ability to pump blood effectively.

Aortic Dissection

Aortic dissection is a life-threatening emergency in which the inner layer of the aorta tears, allowing blood to surge between the vessel walls. It typically presents with sudden, severe tearing or ripping chest or back pain radiating to the back, and requires immediate surgical evaluation.

Explore Individual Symptoms

In-depth pages for each symptom in this combination

Blackouts — Full Overview Causes Treatment When to See a Doctor Related Questions

Dizziness — Full Overview Causes Treatment When to See a Doctor Related Questions

Medical Questions About Blackouts and Dizziness

Evidence-based answers from medical experts

Early Signs of Cardiac Arrhythmia How to Manage Cardiac Arrhythmia Early Signs of Pulmonary Embolism How to Manage Pulmonary Embolism Early Signs of Aortic Stenosis How to Manage Aortic Stenosis Early Signs of Hypotension (Low Blood Pressure)How to Manage Hypotension (Low Blood Pressure)

Clinical Matches — Authority Pages

Condition-level differential and comparison resources for this combination

⚠ Dangerous — Rule Out First:

Pulmonary Embolism Aortic Dissection

Differential analyses:

🔬Cardiac Tamponade: differential →🔬Pulmonary Embolism: differential →🔬Atrial Fibrillation: differential →

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