Key result
Scrub typhus is linked to abnormal ECGs in ~35% of patients without prior heart disease.
Scrub typhus can cause non-specific cardiac damage and ECG changes, though chronic cardiac sequelae are rare.
ECG changes in scrub typhus warrant acute complication vigilance but not routine long-term monitoring; leaves open mechanistic clarification.
The mechanism of electrocardiography (ECG) changes in patients with scrub typhus is still not clear. Orientia tsutsugamushi causes vasculitis in scrub typhus patients, which result in non-specific damage to the heart. However, serious damage to myofibril of the heart is not accompanied. Thus, chronic cardiac sequelae are rare. In addition to myocarditis, a variety of cardiac complications such as myocardial infarction, pericarditis have been reported. Additional research is needed to clarify the main mechanisms that cause changes in the ECG in scrub typhus whether it comes from electrolyte imbalance, fever or cardiac injury such as myocarditis.
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Hong et al. (2014) conducted an editorial in Scrub typhus (n=106). Scrub typhus (Orientia tsutsugamushi infection) was evaluated on Abnormal electrocardiography (ECG) findings. Scrub typhus infection was associated with abnormal ECG findings in 35% of patients without underlying heart disease, predominantly presenting as ischemic changes and arrhythmias.
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