Abstract
Commotio cordis is an important cause of sudden cardiac arrest on the playing field in the US. In Europe it is condsidered rare. The difference is probably due to variation in sports between the continents and also that commotio cordis may be underrecognized in Europe; one particular reason why it is important to inform about the condition. Victims are predominantly young, male and struck in the left chest with a ball or during a body collision. An animal model has been utilized to explore and describe the important variables and mechanism of commotio cordis precisely. The model has provided substantial knowledge to the field of arrhythmias. Impact during a narrow window of repolarization causes ventricular fibrillation. Other important variables include location, velocity, shape and hardness of the impact object. Biological characteristics such as gender, pliability of the chest wall and genetic susceptibility also play a role. The induction mechanism of ventricular fibrillation appears to be an increase in heterogeneity of repolarization caused by induced abnormalities of ion channels activated by abrupt increases in left ventricular pressure from the impact. In the setting of altered repolarization, a trigger of ventricular depolarization (premature ventricular depolarization caused directly by the chest blow) initiates a spiral wave that quickly breaks down into ventricular fibrillation. Prevention of commotio cordis is possible. Improved recognition and resuscitation have led to an improvement in outcome.
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Change history
01 May 2021
The original version of this chapter is revised as follows,
Initially the chapter was published with the co-author name as Eric Solberg.
Now chapter 26 and List of contributors, Table of contents in the Front matter was updated with the Author’s full name as Erik Ekker Solberg.
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1.1 Questions
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1.
Which factors protect against commotio cordis?
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2.
What part of the cardiac cycle is most prone to cardiac arrest as a consequence of a blow to the chest?
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3.
Does a brisk alteration of the autonomic system play a role in inducing commotio cordis?
1.2 Answers
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Protection is potentially achievable by three means: avoidance of chest blows, at least on the cardiac silhouette, chest wall protection e.g. by wearing specially designed gear, or using softer balls.
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2.
10–30 ms prior to the peak of the T-wave in ECG.
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No, when double blocking the autonomic system no differences were found in eliciting SCA by a blow.
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Solberg, E.E., Link, M.S. (2020). Commotio Cordis. In: Pressler, A., Niebauer, J. (eds) Textbook of Sports and Exercise Cardiology. Springer, Cham. https://doi.org/10.1007/978-3-030-35374-2_26
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