In the steady state, cardiac output equals. venous return. Factors that cause hypereffective heart. Sympathetic stimulation can increase the effectiveness of the heart via: (2) increasing the strength of heart contraction. Factors that can cause a hypoeffective heart: (1) coronary artery blockage.
Thursday, March 19, 2015 - 11:09. Ed Sheeran has added yet another amazing accolade to his collection with the news that his global smash hit sophomore album X has hit the 2 million sales mark, joining a select band of chosen superstars to hit the same achievement.
Ed Sheeranâs total chart domination this week â all 16 songs on his album Ã· are in the Top 20 singles, and all of his three albums are in the Top 5 albums â will be the first time in years, save the odd Christmas chart battle, that most of us have had a clue whatâs going on in the Top 40.