Abstract
Aim. This review aimed to explore the issue of cardiac arrhythmias in people with subarachnoid hemorrhage. 
Background. Intracranial injuries may cause cardiac arrhythmia and structural changes. Between 25-90% of patients with subarachnoid hemorrhage experience cardiac arrhythmia. In case of inappropriate diagnosis, unnecessary workup and treatment may be done.
Method. The studies published between 2000 and 2017 were searched for in databases and search engines Google Scholar, Pumped, Science Direct, Magiran, and SID by the keywords electrocardiogram, arrhythmia, ECG abnormalities, intracranial hemorrhage, subarachnoid hemorrhage and their Persian equals.
Findings. Provoking the autoimmune system by stimulating the hypothalamus and increasing the circulating catecholamines in patients with cerebrovascular bleeding are two significant mechanisms responsible for cardiac arrhythmias and myocardial damage.
Conclusion. The timely diagnosis of electrocardiographic changes in patients with cerebral hemorrhage is one of the effective factors in determining the prognosis and deterioration of clinical status. It seems that taking the exact medical history, recording ECG at the time of patient admission, and diagnosing the cerebral hemorrhage, in particular subarachnoid hemorrhage, are necessary measures in the health care centers.