A sour taste in the mouth can be a harbinger of a heart attack, Express reported referring to the data of British doctors.
According to RIA Novosti, symptoms such as indigestion without belching and heartburn, nausea or vomiting may also indicate a heart attack. Besides, one should pay attention to perspiration for no apparent reason, insomnia, and fatigue.
According to experts, the listed symptoms can remain for several days or occur suddenly.
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