Stress Cardiomyopathy

Stress cardiomyopathy is a condition where intense emotional or physical stress causes rapid and severe heart muscle weakness that mimics a heart attack, but without blocked arteries.

Table of contents

• What is stress cardiomyopathy?
• Other names for this condition
• Who is most affected?
• What causes stress cardiomyopathy?
• Common triggers
• Symptoms and warning signs
• How is it diagnosed?
• Treatment and recovery
• Possible complications
• What to expect

What is stress cardiomyopathy?

Stress cardiomyopathy is a condition in which intense emotional or physical stress can cause rapid and severe heart muscle weakness^[2]. The heart’s main pumping chamber, called the left ventricle, changes shape and becomes larger at the bottom while narrowing at the top. This makes part of the heart unable to pump blood as well as it should^[4].

Unlike a typical heart attack where blocked arteries prevent blood from reaching the heart muscle, stress cardiomyopathy happens without any blockages in the coronary arteries. Despite this difference, the symptoms feel very similar to a heart attack, which is why people experiencing this condition need immediate medical attention^[3].

The condition was first described in Japan in 1990^[4]. Doctors noticed that during this condition, the heart takes on a distinctive shape that resembles a Japanese pot used to trap octopuses, which led to one of its common names^[3].

Other names for this condition

takotsubo cardiomyopathy, broken heart syndrome, apical ballooning syndrome, stress-induced cardiomyopathy, transient left ventricular apical ballooning, ampulla cardiomyopathy

Stress cardiomyopathy is known by several different names. It is often called takotsubo cardiomyopathy after the Japanese fishing pot it resembles. Many people know it as “broken heart syndrome” because of its connection to emotional stress and grief^[2].

Other medical terms include apical ballooning syndrome, stress-induced cardiomyopathy, and transient left ventricular apical ballooning^[2]. All of these names describe the same condition where the heart temporarily weakens after severe stress.

Who is most affected?

Stress cardiomyopathy most commonly affects women, who make up about 90% of reported cases^[3]. The condition typically occurs in women who are past menopause, with an average age range of 58 to 77 years old^[7].

One possible explanation for why women are more affected is related to the hormone estrogen. This hormone may protect the heart against harmful effects of stress hormones. As estrogen levels decline with age, women might become more vulnerable to the effects of sudden stress^[7].

The condition affects up to 5,000 people in the UK every year^[13]. It appears in about 2% of people who visit a doctor for suspected heart attack symptoms, and up to 5% of women with these symptoms^[3]. However, experts believe the true number of cases may be higher because the condition is often not recognized^[7].

While less common, stress cardiomyopathy can also happen to men and younger women^[4]. People with anxiety disorders or other mental health conditions may have a higher risk^[4].

What causes stress cardiomyopathy?

Experts are still working to understand exactly what causes stress cardiomyopathy, but several theories exist. Some researchers think it might result from a brief spasm of the coronary arteries or reduced blood flow to the smaller blood vessels of the heart^[4].

The most widely accepted explanation involves an excess release of stress hormones, particularly adrenaline. When someone experiences intense stress, the body releases large amounts of these hormones. This surge of stress hormones may temporarily “stun” the heart muscle, causing changes in heart muscle cells or blood vessels that prevent the left ventricle from contracting properly^[4].

Unlike traditional heart attack risk factors such as smoking or high cholesterol, these do not make someone more likely to develop stress cardiomyopathy^[4]. However, having a family member who experienced this condition may increase risk^[4].

Common triggers

Stress cardiomyopathy can be triggered by various emotional and physical stressors. About 70% of cases have an identifiable trigger, though in 30% of patients no clear cause can be found^[3].

Emotional triggers that may set off the condition include:

• Death of a loved one
• Receiving bad news, such as a serious diagnosis
• Extreme fear or surprise
• Severe anger
• Domestic abuse
• Major financial loss
• Natural disasters^[4]

Interestingly, pleasant emotional stressors have also been reported to cause stress cardiomyopathy^[3].

Physical triggers include:

• Surgery
• Serious illness or infection
• Stroke or seizure
• Acute asthma attack
• Chemotherapy
• Accidental overdose of adrenaline
• Tumors that produce adrenaline^[4]

Symptoms and warning signs

The symptoms of stress cardiomyopathy closely mimic those of a heart attack, which is why it’s crucial to seek immediate medical help. Most people with this condition experience severe chest pain and shortness of breath during emotional stress^[2].

Common symptoms include:

• Sudden, severe chest pain that may feel heavy, squeezing, or crushing
• Shortness of breath
• Rapid or irregular heartbeat
• Feeling faint, weak, or dizzy
• Sweating
• Nausea^[5]

The chest pain typically occurs in the central portion of the chest or upper abdomen and may spread to the arms^[2]. Because these symptoms are identical to those of a heart attack, anyone experiencing them should call emergency services immediately.

In some cases, particularly when stress cardiomyopathy occurs as a complication of another serious illness in hospitalized patients, symptoms may be less obvious or masked by the primary condition^[2].

How is it diagnosed?

Diagnosing stress cardiomyopathy requires ruling out a typical heart attack and identifying the characteristic heart changes. Because symptoms are so similar to a heart attack, several tests are needed to make the correct diagnosis^[2].

Diagnostic tests typically include:

Electrocardiogram (ECG or EKG): This test measures the heart’s electrical activity. In stress cardiomyopathy, it often shows changes that look similar to a heart attack, including ST-segment elevation in certain leads^[2]. One key difference is that stress cardiomyopathy usually lacks ST-segment elevation in lead V1, which helps distinguish it from a heart attack^[2].

Blood tests: Doctors measure cardiac enzymes and biomarkers in the blood. These substances are released when heart muscle is damaged and are typically mildly elevated in stress cardiomyopathy^[2].

Coronary angiogram: This is a crucial test where dye is injected into the heart’s arteries to check for blockages. In stress cardiomyopathy, there are no significant blockages, which is a key difference from a heart attack^[4].

Echocardiogram: This ultrasound test shows how the heart muscle is moving. It reveals the characteristic ballooning pattern where part of the heart enlarges and doesn’t pump properly^[2].

To confirm the diagnosis, doctors look for specific features including transient weakness of the heart’s midsections or apex, no blockages in coronary arteries, new ECG abnormalities, and absence of other conditions like tumors that produce adrenaline or inflammation of the heart muscle^[8].

Treatment and recovery

Treatment for stress cardiomyopathy focuses on supporting the heart while it recovers and preventing complications. Most people recover completely with proper care^[7].

Medications commonly used include:

• Medicines that lower blood pressure and heart rate to reduce the heart’s workload
• Medications to treat irregular heartbeats if they occur
• Blood thinners to prevent blood clots from forming in the weakened heart
• Medications to reduce anxiety and stress levels^[4]

The same medications used to treat other forms of heart failure are often prescribed, though researchers are still working to determine the optimal treatment approach specifically for stress cardiomyopathy^[3].

During recovery, it’s important to address any underlying emotional or physical stressors that may have triggered the condition. Managing stress through relaxation techniques, counseling, or support from loved ones can be helpful^[3].

The condition is usually temporary, lasting from a few days to several weeks^[4]. The heart muscle typically returns to normal function within weeks to months^[5].

Possible complications

While stress cardiomyopathy was once believed to be less serious than a typical heart attack, research has shown that it can lead to significant complications. The rates of serious problems during hospitalization are similar to those seen with traditional heart attacks^[3].

Potential complications include:

• Heart failure: The weakened heart may not pump enough blood for the body’s needs
• Dangerous heart rhythms: Irregular heartbeats can occur, including potentially life-threatening ones
• Blood clots: When blood pools in the weakened heart chamber, clots can form and potentially travel to the brain causing a stroke
• Cardiogenic shock: In severe cases, the heart may not pump enough blood and oxygen to vital organs
• Cardiac arrest: The heart may stop beating suddenly and unexpectedly^[7]

Close monitoring in the hospital is essential to watch for and treat these complications if they occur.

What to expect

The outlook for stress cardiomyopathy is generally good, with most people making a full recovery. The heart muscle weakness is reversible, and with proper treatment, heart function typically returns to normal^[2].

However, some people may continue to feel unwell even after the heart has healed^[5]. There is also a risk of the condition happening again, especially if a person experiences another severe stressor. Previous history of stress cardiomyopathy increases the risk of future episodes^[4].

Long-term management focuses on preventing recurrence through stress management and continued medical follow-up. Learning healthy ways to cope with stress, maintaining strong social support, and following prescribed medications can help protect against future episodes.

As awareness of stress cardiomyopathy increases among doctors and patients, more cases are being recognized and properly treated^[3]. This growing understanding will help improve care and outcomes for people affected by this condition.