What is commotio cordis? The rare condition that may have killed Jesús de Miguel

Jesús de Miguel, a Tenerife player, died during a Segunda División match; reports suggest commotio cordis, a rare condition causing sudden cardiac arrest from chest impact.

Jesús de Miguel, a CD Tenerife player, died during a recent Segunda División match against FC Andorra. While no official cause has been confirmed, some reports suggest commotio cordis may have been responsible.

Commotio cordis, meaning "agitation of the heart," is a rare but well-documented medical condition that can cause sudden cardiac arrest following a blow to the chest. First described in the 1850s, the condition occurs when an impact strikes the chest at a precise moment during the heartbeat—specifically during the T-wave, a vulnerable 30-millisecond window in the heart's electrical cycle. A powerful blow during this brief period can disrupt the heart's electrical rhythm, potentially triggering ventricular fibrillation, where the heart's lower chambers quiver chaotically instead of pumping blood effectively. This leads to cardiac arrest and loss of consciousness.

The condition is rare but life-threatening, most commonly affecting children and teenagers aged 4 to 18, with males accounting for 94% of sporting cases. Football has recorded deaths linked to commotio cordis before; a study of sudden deaths in football between 2014 and 2018 found that 9% of players aged 35 and younger who died suddenly while playing had, or were thought likely to have had, the condition. In 11 cases, the impact came from a football striking the chest.