Photo: Sam Mircovich / Reuters
Scientists of the University of the Pacific in California (USA) found that drinking liters of energy drinks in a short period of time contributes to heart rhythm disturbances. About it reported in a press release on MedicalXpress.
The study involved 34 volunteers aged 18 to 40 years who randomly suggested to drink about a liter or energy drink with caffeine, or its substitute-a placebo as a control. The caffeine content reached 304-320 milligrams. Subjects drank for an hour, but no faster than one half-liter bottle in half an hour.
The participants filmed an ECG and measure blood pressure before the experiment and every 30 minutes after drinking for four hours. It is assumed that caffeine in a dose of 400 milligrams should not cause any changes in the electrocardiogram. However, those who drank energy drinks, the QT interval, which is a measure of the heart activity, was 6-7,7 milliseconds longer than the rest of the volunteers. Also been found to increase systolic and diastolic blood pressure at four to five millimeters of mercury.
QT shows the time required for the ventricles to prepare for the re-reduction. Too short or too long interval may cause malfunction of heart and life-threatening arrhythmias.
Video, photo All from Russia.