“Physiological properties of the heart. Heart as a pump ”
Transcript of “Physiological properties of the heart. Heart as a pump ”
““Physiological properties of Physiological properties of the heart. Heart as a pump the heart. Heart as a pump ””
ContentsContents::
1. 1. Morphological and functional Morphological and functional properties of the heartproperties of the heart
2. 2. AutomatismAutomatism
3. 3. ExcitabilityExcitability
4. 4. ConductibilityConductibility
5. 5. ContractilityContractility
66.. Pump work of the heart Pump work of the heart
7. Heart sounds7. Heart sounds
8. Echocardiography8. Echocardiography
AutomatismAutomatism
Active potentialActive potential of contractiveof contractive heart cellsheart cells
Phases of active potentialPhases of active potential
0 – 0 – depolarizationdepolarization 1 – 1 – beginning rapid beginning rapid
repolarizationrepolarization 2 – 2 – slowly repolarization or slowly repolarization or
plateauplateau 3 – 3 – ending rapid ending rapid
repolarizationrepolarization 4 – 4 – rest periodrest period..
4 – 4 – absolute absolute refractivityrefractivity; ;
5 – 5 – relative relative refractivityrefractivity; ;
6 – 6 – period of period of increase increase excatabilityexcatability;;
7 - 7 - exaltationexaltation
Active potential, contraction, excitability of Active potential, contraction, excitability of heart cells heart cells
2 – 2 – SA nodeSA node; ;
3 – 3 – Bachman tractBachman tract; ;
4 – 4 – tracts of tracts of BachmanBachman, , VenkebachVenkebach,,
TorelTorel
6 –6 – AV node AV node
7 – 7 – Hiss bungleHiss bungle
8 – 8 – right leg of Hiss bungleright leg of Hiss bungle
9 – 9 – anterior brunch of left leg of anterior brunch of left leg of Hiss bungleHiss bungle
10 – 10 – posterior brunch of left leg of posterior brunch of left leg of Hiss bungleHiss bungle
11 - Kent bungle11 - Kent bungle
12 – 12 – Jams bungleJams bungle
13 - 13 - Meacham bungleMeacham bungle
Conductive system of heartConductive system of heart
Cardiac cycleCardiac cycle Systole Systole
1. period of tension1. period of tension asynchrony contractionasynchrony contraction isometric contractionisometric contraction (all valves are closed) (all valves are closed) 2. period of ejection2. period of ejection protosphigmic interval protosphigmic interval
(opening of semilunear valves)(opening of semilunear valves) fast ejectionfast ejection slow ejectionslow ejection
Cardiac cycle Cardiac cycle DiastoleDiastole
1. Period of relaxation1. Period of relaxation protodiastolic interval (closing of protodiastolic interval (closing of
semilunear valves)semilunear valves) phase of isometric relaxation phase of isometric relaxation
(opening of AV-valves is end of this phase)(opening of AV-valves is end of this phase) 2. Period of filling2. Period of filling phase of rapid fillingphase of rapid filling phase of slow fillingphase of slow filling phase of filling by help of atrium phase of filling by help of atrium
systole systole
Heart sounds. ComponentsHeart sounds. Components I tone.I tone. 1. 1. Valve component (AV Valve component (AV
valves)valves). . 2. 2. Muscle componentMuscle component.. 3. 3. Vessels componentVessels component
(opening of semilunear valves)(opening of semilunear valves) 4. Atrium component4. Atrium component.. II tone. 1. II tone. 1. Valve componentValve component
(closing of semilunear valves)(closing of semilunear valves) 2. 2. Vessels componentVessels component..
EchocardiographyEchocardiography
1. M-measure1. M-measure 2. D-measure2. D-measure 3. Doppler3. Doppler 4. Contrasing4. Contrasing
Thank you!Thank you!