Estimation of Heart Rate and Heart Rate Variability from ...
Autonomic Control & Heart Rate
-
Upload
sajidsaiyad -
Category
Documents
-
view
219 -
download
0
Transcript of Autonomic Control & Heart Rate
-
8/18/2019 Autonomic Control & Heart Rate
1/13
Autonomic Innervation of heart
Heart Rate
-
8/18/2019 Autonomic Control & Heart Rate
2/13
Heart rate
• Normal :- 60 – 80 beats / min.
• Both sm!. " !arasm!. #ut :- $00 / min.
• %a&al tone:- 'ee!s HR at (0 to 80 beats / min
• %a&otom:- HR becomes $60 to $(0 / min.• Restin& sm!athetic tone - increase the HR
u! to $)0 beats/min
• *achcar+ia :- Increase in HR
• Bra+car+ia :- ,ecrease in HR
-
8/18/2019 Autonomic Control & Heart Rate
3/13
actors affectin& HR
• A&e :- Inverse relation
• e :- ore in females +/t more sm!. *one
• 1ercise :- ,irect relation 2ith &ra+e of
eercise.
#auses – sm!. Activit3va&al tone3 bo+
tem!. catecholamines3 *4 " h!oia3
h!erca!nea3 aci+emia• Bo+ tem!erature:- 5 $0 beats for $ rise
• are7s a2:- Inverse relation 2ith B9
• ,ru&s:- 1!ine!hrine 3Nore!ine!hrine
-
8/18/2019 Autonomic Control & Heart Rate
4/13
• 1motions:-1citement3 an&er 5;3shocinus Arrhthmia7 - Ins!iration5;31!iration=;
• lee!:-=;
• eals:- 5;
• Athletes:-=; +ue to5 va&al tone
• ,iseases:- *hrotoicosis 5;3#ushin&7s
refle=;3 anemia 5;3 shoc< 5;
actors affectin& HR?..cont+
-
8/18/2019 Autonomic Control & Heart Rate
5/13
Innervation @f Heart
-
8/18/2019 Autonomic Control & Heart Rate
6/13
#ar+iac innervationm!athetic
•Heart
$;5 rhthmicit of AN i.e. HR ve chronotro!iceffect;
); 5 s!ee+ " force of contraction of mocar+iumve ionotro!ic effect;
; 5 con+uctivit of tissue ve +romotro!ic effect;
4; 5 ecitabilit of heart ve bathmotro!ic effect;
• Bloo+ vessels – bin+s to C rece!tors
– %asoconstriction
-
8/18/2019 Autonomic Control & Heart Rate
7/13
•1ffects:-
$; =rhthmicit of AN i.e. = HR -ve chronotro!ic
effect;
); = s!ee+ " force of contraction of mocar+ium -ve
ionotro!ic effect;
; = con+uctivit of tissue -ve +romotro!ic effect;
4; = ecitabilit of heart -ve bathmotro!ic effect;
#ar+iac innervation9arasm!athetic
-
8/18/2019 Autonomic Control & Heart Rate
8/13
Autonomic control - sm!athetic
M e m b r a n e p o t e n t i a l ( m V
)
Sympathetic
stimulation
Resting
Threshold
Seconds
•Nore!ine!hrine acts on B a+rener&ic rece!tors of
heart•ore ve R9 +ue to 5 !ermeabilit for Na "
#a ions
-
8/18/2019 Autonomic Control & Heart Rate
9/13
Autonomic control - !arasm!athetic
•Ach acts on muscarinic rece!tors
•H!er!olariDation +ue to 5 !ermeabilit for ' ions
M e m b r a n e
p o t e n t i a l ( m V
)
Resting
Parasympathetic
stimulation
Threshold
Seconds
-
8/18/2019 Autonomic Control & Heart Rate
10/13
Heart Rate
A&e
e
1ercise
Bo+ *em!erature
,ru&s
,iseases
1motions
Res!iration
lee!
eals
Athletes
Nerves#ar+iac @ut!ut
Ehich factors #han&e *he Heart RateF
-
8/18/2019 Autonomic Control & Heart Rate
11/13
Brain Areas Involve+ in #ontrol
-
8/18/2019 Autonomic Control & Heart Rate
12/13
Re&ulation of HR
• ocal :- tretch3 *em!.3 BR3 *4-,irect effect
• Nervous :-
– Central – corte3 h!othalamus3 %#3va&al centre
– Reflexes :- e.&. Barorece!tors3chemorece!tors3 Bainbri+&e refle
• Hormonal :- 1!ine!hrine3 noe!ine!hrine3 *4
-
8/18/2019 Autonomic Control & Heart Rate
13/13
*han< Gou