Svenska död i dykolycka på Malta

-changes in pressure, secondary to breathing a high density gas mixture which increases the pressures in the heart (afterload).
-A high oxygen concentration (hyperoxia) can slow the heart rate, a commonly observed phenomenon.
-An increase in hydrostatic pressure can alter electrical conduction in the heart.(excitability and conduction speed)
-During decompression, bubbles (gaseous pulmonary embolism) may increase right heart pressures and cause a paradoxical embolism in patients with a right-to-left shunt (patent foramen ovale).
-Immersion, (getting into the water to the neck), increases the blood flowing into the heart (preload).
-Hypothermia also plays a role causing vasoconstriction (afterload), slowing the heart rate. These factors may disturb cardiac function and expose patients with heart disease to accidents during underwater diving.