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 Sheeran (born 17 February 1991) is a British singer-songwriter popular for his singles 'The A Team', 'Lego House' and 'Sing'. Net Worth: Sheeran has a net worth of $35 million (2016) according to various sources. Childhood: Ed was born in Hebden Bridge, West Yorkshire. His parents are art curator John Sheeran and jewelry designer Imogen Lock.