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The electrocardiograms of seven young men were studied to determine the effects of Δ-9-tetrahydrocannabinol (THC), the most psychoactive component of marihuana. Two doses of THC, 200μg/kg of body weight and 300μg/kg, were given orally to each subject at a three-day interval, and placebo was administered between the two doses of THC. After the small dose of THC, only two of the seven subjects showed electrocardiographic changes, but after the larger dose, six manifested increased heart rate, two developed S-T-segment and T-wave changes, and one had premature ventricular contractions. No electrocardiographic changes occurred after the placebo was administered. Marihuana may affect the heart, and its repeated use may have a cumulative effect.
Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature
Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal
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