Intense emotions are associated with premature cardiac contractions
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The adrenaline rush that occurs during an argument can cause dangerous heart palpitations
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We advise Tony Blair to stay calm during the UK election: a study conducted on people with heart problems suggests that angry outbursts precede very dangerous heart palpitations.
Although Prime Minister Blair currently has no heart problems, in October 2004 he underwent treatment to correct heart arrhythmias. The results of the study are probably true not only for heart patients, but also for people with healthy hearts.
To investigate the relationship between intense emotions and heart rate, Matthew Stopper of Yale University and his colleagues studied 24 patients with implanted pacemakers. They asked the patients to keep a diary in which they had to report their feelings.
These patients have a health condition that may cause a disturbance to the electrical signals in their heart. Such a disorder causes an unhealthy flutter of the heart muscle. Such fibrillation can lead to cardiac arrest. The patients' implanted pacemakers are designed to detect the abnormal fibrillation and then deliver an electric shock that may save the patient's life. The electric shock returns the heart to its normal rhythm and stops the fibrillation.
After receiving such an electric shock, the patients in the study were asked to report how angry they were before the electric shock, on a scale of 1 to 5.
The laws gathered information from the pacemaker to check how big the damage was to the heart.
Breathtaking data
Of the 56 electrical shocks that occurred during the study, the researchers found that in 100% of the shocks in which the patients reported anger above level 2, the arrhythmias began with an early series of rapid cardiac contractions. This type of contraction is known to be a risk factor for cardiac arrest.
In contrast, only 68% of the arrhythmias that were not preceded by feelings of anger were of the dangerous type. Stopper and his colleagues presented these findings on May 5 at the annual meeting of the Heart Rhythm Society in New Orleans, Louisiana.
"We know that emotional distress due to earthquakes, a missile attack and even losing an important football game can cause a heart attack," says health psychologist Doug Carroll from the University of Birmingham in the UK. "Until now, it was assumed that this was due to an increased risk of blood clot formation. However, this study shows us that strong emotions, such as anger, can also interfere with the electrical rhythms of the heart."
Stopper's group is still not sure exactly how anger causes this phenomenon. However, they think that this may be related to the burst of adrenaline accompanying the outburst of anger, and it is possible that this burst of adrenaline is the cause of the disturbances in the electrical signals in the heart and the rapid contractions.
An adapted article from the Nature News website
The knower of the heart
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