Catawba rhododendron bushes can reach a height of 6'-8' with a spread of 4'-6'. Displays are most effective when rhododendron bushes are massed together. These are poisonous plants -- do not allow children to ingest any of the azaleas or rhododendrons.
Best Answer: Tornadoes are caused by winds. When a tornado forms the wind pressure around the tornado drops and that's what you see on the barometer, the pressure goes down.
What happens to atrial pressure during isovolumetric contraction? There is a brief pressure wave due to mitral valve leaflets bulging into the atrial when ventricular pressure increases. This increases the atrial pressure initially.