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Can heart problems cause dizziness?

Dizziness is a common symptom that can be caused by a wide variety of medical conditions. One potential cause is an underlying heart problem. The heart and circulatory system work together to pump blood throughout the body. If something goes wrong with this process, it can lead to insufficient blood flow to the brain, resulting in symptoms like dizziness, lightheadedness, and fainting. In this article, we will explore the connection between heart problems and dizziness, looking at the most common cardiac conditions that can contribute to balance issues and symptoms of vertigo.

What causes dizziness?

Dizziness is the sensation of being lightheaded, woozy, or feeling like you or your surroundings are spinning. There are many potential root causes of dizziness, including:

– Inner ear problems – Conditions affecting the inner ear, like benign paroxysmal positional vertigo (BPPV) or Meniere’s disease, disrupt the body’s balance system and can lead to vertigo.

– Medication side effects – Some medications, like diuretics and blood pressure medications, can cause lightheadedness as a side effect.

– Low blood pressure – Also called hypotension, low BP reduces blood flow to the brain and causes dizziness when standing up from sitting or lying down.

– Dehydration – Being dehydrated reduces overall blood volume, which lowers blood pressure and blood flow.

– Heart disorders – Improper functioning of the heart can diminish blood supply to the brain and result in temporary dizziness.

How do heart problems contribute to dizziness?

To understand how heart conditions can lead to dizziness, it helps to first understand how blood gets pumped throughout the body. This is the general process:

– The heart’s left ventricle fills up with blood, then contracts to pump blood out into the aorta and systemic circulatory system.

– Arteries carry oxygenated blood from the heart to all organs and tissues.

– Capillaries allow for the exchange of oxygen, nutrients, and waste at the cellular level.

– Veins return deoxygenated blood back to the heart’s right atrium.

– The right ventricle pumps blood to the lungs to pick up more oxygen.

– Then the newly oxygenated blood goes back to the left atrium and the process repeats.

Any disruption of this normal cardiovascular activity can potentially result in dizziness. Here are some of the key ways heart problems contribute:

– Irregular heart rhythms – Abnormal heart beats or arrhythmias disrupt adequate blood flow.

– Valve problems – Defective heart valves impede blood flow through the chambers.

– Heart failure – A weakened heart muscle leads to reduced pumping ability.

– Congenital heart defects – Defects present from birth can alter blood flow.

– Blocked blood vessels – Plaque buildup restricts blood flow to the brain.

The end result is that insufficient oxygenated blood reaches the brain, particularly when standing up. This triggers symptoms like lightheadedness, unsteadiness, and fainting.

Common heart conditions that can cause dizziness

Many different types of cardiovascular diseases and heart problems have been associated with dizziness. Some of the most frequent connections include:


Arrhythmia refers to any abnormal heart rhythm. When the heart beats too fast, too slow, or erratically, it often can’t pump enough blood to the brain. Types of arrhythmia that may produce dizziness include:

– Atrial fibrillation – Rapid, irregular beating of the heart’s upper chambers.

– Heart palpitations – Noticeable changes in heart rate and rhythm.

– Bradycardia – Dangerously low heart rate below 60 bpm.

– Tachycardia – Rapid heart rate over 100 bpm.

Heart valve disorders

Defective or damaged heart valves prevent smooth blood flow between the heart’s chambers and out to the body. Valve problems linked to dizziness include:

– Mitral valve prolapse – Causes blood to leak backwards through the mitral valve.

– Aortic stenosis – The heart’s aortic valve becomes narrowed.

– Pulmonic stenosis – Obstruction of blood flow through the pulmonary valve.

Heart failure

Also called congestive heart failure (CHF), heart failure means the heart muscle has become too weak to pump adequately. Reduced cardiac output can manifest as dizziness along with shortness of breath and fatigue.

Coronary artery disease (CAD)

Plaque accumulation called atherosclerosis narrows the coronary arteries supplying the heart muscle itself with oxygenated blood. This imbalance can trigger heart rhythm issues leading to dizziness.


This term refers to diseases of the actual heart muscle that make it harder for the heart to pump strongly. Dilated cardiomyopathy is one example that may cause lightheadedness.

Congenital heart defects

Birth defects of the heart, like a hole between chambers or anomalous vessels, can disrupt normal blood circulation and oxygenation, potentially leading to dizziness and vertigo. This is especially true for defects that cause mixing of oxygenated and deoxygenated blood.

Other symptoms and risk factors

Dizziness may not be the only symptom experienced with heart-related causes. Other associated signs can include:

– Chest pain, pressure, or discomfort
– Shortness of breath
– Palpitations or fluttering sensations in the chest
– Fatigue, especially with exertion
– Swelling in the legs (edema)
– Fainting or loss of consciousness

Certain risk factors also increase the chances of developing cardiovascular diseases that could potentially contribute to dizziness, such as:

– High blood pressure
– High cholesterol
– Diabetes
– Smoking
– Obesity
– Physical inactivity
– Family history of heart disease
– Older age
– Stress

Paying attention to additional symptoms and being aware of personal risk factors can help identify when dizziness may be stemming from an underlying heart problem.

Diagnosing heart issues that cause dizziness

Since dizziness has so many possible causes, diagnostic tests will be needed to pinpoint whether cardiovascular health is contributing to balance problems and lightheadedness. To check for heart-related causes, a doctor may order:

– Blood tests – To look for signs of heart muscle damage, such as elevated troponin levels.

– Electrocardiogram (EKG/ECG) – Records electrical activity of the heartbeat to detect irregular rhythms.

– Echocardiogram – Uses ultrasound to visualize the heart’s structure and function.

– Stress test – Monitors EKG patterns and vital signs during exertion.

– Holter monitor – A long-term portable EKG monitor worn for 24-48 hours.

– Cardiac catheterization – Inserts a thin tube into the heart to visualize vessels and measure pressure.

– Carotid ultrasound – Checks for blockages in the carotid arteries that supply the brain.

– Tilt table test – Evaluates heart rate and blood pressure changes with postural position.

These and other heart-focused tests can identify any underlying cardiac contributors to dizziness symptoms.

Treating heart conditions to alleviate dizziness

Treatment will depend on the specific heart disorder involved, but may include a combination of lifestyle changes, medications, medical procedures, or surgery. Some general treatment approaches include:


– Blood thinners – Help prevent clots and improve blood flow.

– Beta-blockers – Help slow heart rate and regulate rhythm.

– ACE inhibitors – Lower blood pressure and reduce strain on the heart.

– Diuretics – Reduce fluid buildup and swelling.

Medical procedures

– Cardioversion – Uses electricity to restore normal heart rhythm.

– Catheter ablation – Destroys small areas disrupting normal electrical pathways.

– Pacemaker – Implanted device regulates heart rhythm.

– Valve repair/replacement – Fixes or replaces defective heart valves.


– Coronary artery bypass – Reroutes blood around blocked vessels.

– Heart transplantation – Replaces a failing donated heart.

– Ventricular assist device (VAD) – Mechanical pump helps a weak heart.

Lifestyle changes

– Following a heart-healthy diet low in salt, fat, and cholesterol.

– Exercising regularly but avoiding overexertion.

– Quitting smoking and limiting alcohol intake.

– Reducing stress through yoga, meditation, or other relaxation methods.

– Getting adequate sleep and rest.

– Staying well hydrated to avoid dehydration.

– Using compression stockings to improve circulation.

– Slowly moving from sitting to standing to accommodate blood pressure changes.

A combination approach tailored to the individual’s heart condition offers the best chance at resolving dizziness symptoms while also treating the underlying cardiovascular disease.

Prognosis for dizziness caused by heart problems

The prognosis for dizziness related to heart disease depends strongly on the specific condition involved and how well it responds to treatment.

Many forms of heart disease can be well-managed with modern treatment methods. For example, arrhythmias often can be successfully treated through medications, medical procedures, or implanted devices to restore normal sinus rhythm. However, conditions like congestive heart failure may progressively worsen over time despite treatment.

Aggressively addressing modifiable risk factors like high blood pressure and elevated cholesterol can help prevent development of advanced heart disease and improve long-term outcomes. Catching and treating heart conditions early on also leads to more favorable prognoses.

With proper diagnosis and management of the underlying heart disorder, symptoms like dizziness and lightheadedness often resolve or substantially improve. But heart disease requires lifelong monitoring and management. Close follow-up care with a cardiologist is key for optimizing prognosis.

Prevention tips to reduce dizziness

While not every case of heart-related dizziness is avoidable, several lifestyle measures can help reduce the risks:

– Maintain healthy blood pressure through diet, exercise, and medication if prescribed.

– Keep cholesterol and triglycerides controlled through medication or lifestyle adjustments.

– Prevent or aggressively manage diabetes through diet, physical activity, and medication as needed.

– Exercise regularly at moderate intensity for at least 150 minutes per week.

– Follow a heart-healthy diet low in sodium, saturated and trans fats, added sugars, and refined carbohydrates.

– Reach or maintain a healthy body weight.

– Limit alcohol intake to no more than 1 drink per day for women or 2 for men.

– Don’t start smoking, and quit if currently smoking.

– Reduce stress through yoga, meditation, counseling, or other stress-busting practices.

– Take medications as directed and keep up with regular visits with your healthcare providers.

– Know the signs of stroke and heart attack and call 911 immediately if they occur.

While dizziness can stem from benign causes like dehydration, viral infections, or medication effects, recurrence or persistence warrants medical evaluation. Catching and addressing any heart health concerns early is key to preventing progression and optimizing outcomes.

When to seek emergency treatment for dizziness

Most transient lightheadedness can be managed with self-care strategies like drinking more fluids or lying down until symptoms pass. But some types of dizziness require prompt emergency care, including:

– Dizziness or vertigo accompanied by chest pain or pressure

– Severe lightheadedness with shortness of breath

– Fainting episodes or loss of consciousness

– Sudden and severe dizziness after a head injury

– Vertigo along with slurred speech, confusion, or weakness

– Dizziness that worsens despite medications and home treatment

– Persistent imbalance that increases risk of falls

Seek immediate medical care if experiencing these types of severe or persistent dizziness symptoms that may indicate a heart attack, stroke, or other medical emergency. Call 911 or have someone drive you to the nearest emergency room right away.

Key takeaways

– Heart disorders are a potential cause of dizziness and vertigo due to reduced blood flow to the brain.

– Arrhythmias, heart failure, valve defects, and blocked heart vessels can all contribute to lightheadedness.

– Diagnostic tests like EKGs, echocardiograms, and cardiac stress tests help identify heart problems.

– Treating the underlying cardiovascular condition can resolve dizziness, but may require medications, procedures, surgery, or lifestyle changes.

– Controlling heart disease risk factors through lifestyle can help prevent dizziness episodes.

– Seek emergency care for sudden or severe dizziness, which may indicate a medical crisis like stroke.

– Ongoing follow-up with cardiology providers is important for optimal management of heart disease and related symptoms.


Dizziness and imbalance are common but nonspecific symptoms with many potential causes. Given how vital adequate blood flow is for delivering oxygen to the brain, various forms of heart disease can disrupt this process and lead to lightheadedness, vertigo, and fainting episodes.

By recognizing associated symptoms and risk factors, dizziness resulting from underlying heart problems can be properly diagnosed. Addressing the cardiovascular condition through some combination of lifestyle changes, medications, procedures, or surgery can often successfully treat dizziness and improve prognosis. Prompt emergency care is essential for sudden or severe symptoms indicating an imminent medical emergency. With proper long-term management, many heart problems can be controlled to minimize troubling bouts of dizziness.