- Joined
- Nov 1, 2011
- Messages
- 89
- Reaction score
- 1
Ok, so without getting into physiology because thats a second year subject and im in first year, can somebody explain to me systole and diastole???
What I got from reading the book is that the filling phase is ventricular diastole, so this means the atrioventricular valves have to be opened. This is what I do not understand. Do the papillary muscles contract and pull the cusps downward exerting a force on the chorda tendinae? it doesnt make sense to me, because when they relax, the cusps should prolapse into the atrium and it says in the book that never happens? and same on ventricular systole, how do the cusps close without prolapsing into the atrium? either the chorda tendinae are the same length through the whole process and they do not act like normal tendons and the papillary muscles are the ones that get further and nearer or I do not understand.
Can someone explain this to me in a basic way without getting into complicated physiology??? thanks
What I got from reading the book is that the filling phase is ventricular diastole, so this means the atrioventricular valves have to be opened. This is what I do not understand. Do the papillary muscles contract and pull the cusps downward exerting a force on the chorda tendinae? it doesnt make sense to me, because when they relax, the cusps should prolapse into the atrium and it says in the book that never happens? and same on ventricular systole, how do the cusps close without prolapsing into the atrium? either the chorda tendinae are the same length through the whole process and they do not act like normal tendons and the papillary muscles are the ones that get further and nearer or I do not understand.
Can someone explain this to me in a basic way without getting into complicated physiology??? thanks