The posterior part of the forebrain that connects the mesencephalon with the cerebral hemispheres, encloses the third ventricle, and contains the thalamus and hypothalamus.
So when the atria contract, the valves sandwiched between the atria and the ventricles open, and the blood in each atrium flows through its respective valve down into a ventricle.
Scans of the hearts of 25 men with long-term history of cocaine use picked up structural damage in 83% of participants and swelling in the lower left ventricle in around 47%.
