Heart Contusion: Symptoms and Recovery After a Chest Injury

What happens when the heart is bruised

The heart sits directly behind the breastbone (sternum), with the right ventricle closest to the front. A sudden blow compresses the heart between the sternum and the spine, or it decelerates violently against the chest wall when a moving body stops abruptly. The force tears tiny blood vessels within the muscle, causing bleeding, swelling and patches of damaged muscle cells, just as a bruise forms in a thigh muscle.

Bruised heart muscle can:

• Fire abnormal electrical signals, causing extra beats or rhythm disturbances
• Pump less strongly in the injured area, usually the right ventricle
• Leak enzymes such as troponin into the blood, the same marker used to detect heart attacks

How the clinical team assesses and grades the injury is covered in our page on cardiac contusion (blunt cardiac injury).

Heart contusion symptoms

Symptoms may start immediately or be delayed by hours. They are easily masked by other injuries such as broken ribs.

• Chest pain: often behind the breastbone, aching or pressing, sometimes like angina. It does not ease with rest.
• Heart palpitations: a fluttering, pounding or skipping heartbeat
• Fast heart rate: a resting pulse persistently above 100 beats per minute without another reason such as pain or blood loss
• Shortness of breath, especially on lying flat
• Lightheadedness or fainting, from a rhythm problem or reduced pumping
• Visible chest wall injury: bruising, a seat belt mark, steering wheel imprint or tenderness over the sternum

Many people with a mild heart contusion have no specific heart symptoms at all, which is why doctors screen with an ECG after significant chest trauma.

Warning signs of complications

• Swollen neck veins, falling blood pressure and muffled heart sounds can mean blood is collecting in the sac around the heart (cardiac tamponade).
• New breathlessness, leg swelling or a crackling cough suggest the heart is failing to pump.
• Sudden collapse means a life-threatening rhythm such as ventricular fibrillation.

Common causes

A related but different event is commotio cordis: a blow to the chest, typically from a baseball, hockey puck or lacrosse ball, lands at a precise moment in the heartbeat and triggers cardiac arrest without bruising the muscle at all. It mainly affects children and teenagers and needs immediate CPR and a defibrillator (AED).

How a heart contusion is found

No single test confirms a bruised heart. Doctors combine:

1. ECG (electrocardiogram): the main screening test. It looks for rhythm problems, extra beats, conduction block or changes that suggest injury.
2. Troponin blood test: raised levels indicate heart muscle damage. A normal ECG plus a normal troponin effectively rules out a significant contusion.
3. Echocardiogram (heart ultrasound): done if the ECG or troponin is abnormal, or if blood pressure is low. It shows weak wall movement, valve damage and fluid around the heart.
4. Chest X-ray and CT scan: to find associated injuries such as rib fractures, a broken sternum, lung bruising or damage to the aorta.

People with an abnormal ECG or troponin are usually kept on a heart monitor for at least 24 hours.

Treatment

There is no medicine that heals the bruise directly. Treatment supports the heart while it recovers and manages complications:

• Monitoring on a cardiac monitor until rhythm and blood tests settle
• Pain relief, which also helps breathing if ribs are broken
• Treating rhythm problems with medicines, correction of potassium and magnesium, or electrical cardioversion when needed
• Supporting blood pressure with fluids or medicines if the heart pumps weakly
• Drainage or surgery for bleeding around the heart, or repair of rare valve or wall injuries

Blood thinners are generally avoided early on because they can worsen bleeding within the heart muscle or elsewhere.

Recovery and outlook

Most people with an uncomplicated heart contusion leave hospital within a few days. The bruised muscle usually heals over 3 to 6 weeks. Doctors commonly advise:

• avoiding strenuous exercise, heavy lifting and contact sport until cleared, often for 4 to 6 weeks
• reporting any palpitations, fainting or breathlessness straight away
• a repeat echocardiogram if heart function was reduced

Long-term problems are uncommon. Rarely, a weakened area of muscle balloons into a ventricular aneurysm, or a lasting rhythm disorder develops. Severe contusions with heart rupture are often fatal before reaching hospital.

Frequently asked questions

What are the symptoms of a heart contusion?

The main symptoms are chest pain behind the breastbone, a fast or irregular heartbeat, palpitations, shortness of breath and lightheadedness after a blow to the chest. Many mild cases cause no clear heart symptoms, so doctors check an ECG and troponin blood test after significant chest trauma.

Can a seat belt cause a bruised heart?

Yes. In a high-speed crash the seat belt and airbag stop your body suddenly, compressing the chest. A seat belt still greatly reduces deaths and serious injury, but a visible belt mark across the chest is a reason to be checked in the ER for heart and lung bruising.

How long does a heart contusion take to heal?

A mild contusion usually heals in 3 to 6 weeks. Rhythm problems, if they happen, typically appear in the first 24 to 48 hours. Your doctor will tell you when it is safe to return to exercise, usually after symptoms settle and tests are normal.

Is a contusion of the heart dangerous?

Most are not, but a minority cause dangerous heart rhythms, reduced pumping or bleeding around the heart. That risk is why doctors monitor people with abnormal tests. If your ECG and troponin are normal after a chest injury, the chance of a significant heart injury is very low.

What is the difference between a heart contusion and a heart attack?

A heart attack happens when a blocked coronary artery starves the muscle of oxygen. A heart contusion is direct physical bruising from trauma. Both can cause chest pain and raised troponin, so after an injury doctors sometimes need an angiogram to make sure an artery was not also damaged.