SISTEMUL CIRCULATOR at University of Medicine and Pharmacy of Cluj-Napoca

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Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

Ce este DEBITUL CARDIAC?

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

Cu cat este egal debitul cardiac de repaus?

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

Cum este influentata frecventa cardiaca de sistemul nervos?
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Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

Volumul bataie variaza cu....

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

DEPOLARIZAREA unei celule cardiace este transmisa celulelor adiacente.
⛓⛓⛓⛓⛓⛓⛓

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

❤️INIMA functioneaza ca doua SINCITII

unul atrial
           
si unul ventricular

IZOLATE DIN PUNCT DE VEDERE ELECTRIC 🔌

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

💪🏻MUSCULATURA inimii este alcatuita din 2️tipuri de celule musculare:

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Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

EXCITABILITATEA

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

PARTICULARTATE A EXCITABILITATII INIMII

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

AUTOMATISMUL

Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

STIMULII cu frecventa mare nu pot tetaniza inima prin sumarea contractiilor.
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AUTOMATISMUL este generat in anumiti centrii (care au in alcatuirea lor celule care initiaza si conduc impulsurile)

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Exemplary flashcards for SISTEMUL CIRCULATOR at the University of Medicine and Pharmacy of Cluj-Napoca on StudySmarter:

SISTEMUL CIRCULATOR

Ce este DEBITUL CARDIAC?
Debitul cardiac reprezinta volumul de sange expulzat de fiecare ventricul intr-un minut.

El este egal cu volumul de sange pompat de un ventricul la fiecare bataie, inmultit cu frecventa cardiaca.

SISTEMUL CIRCULATOR

Cu cat este egal debitul cardiac de repaus?
5L/min

SISTEMUL CIRCULATOR

Cum este influentata frecventa cardiaca de sistemul nervos?
Simpaticul determina cresterea frecventei cardiace.

Parasimpaticul o scade

SISTEMUL CIRCULATOR

Volumul bataie variaza cu....
Volumul bataie variaza cu:


Forta contractiei ventriculare

Presiunea arteriala

Volumul de sange aflat in ventricul la sfarsitul diastolei

SISTEMUL CIRCULATOR

DEPOLARIZAREA unei celule cardiace este transmisa celulelor adiacente.
⛓⛓⛓⛓⛓⛓⛓
Prin urmare, miocardul este un sincitiu functional. ❤️


SISTEMUL CIRCULATOR

❤️INIMA functioneaza ca doua SINCITII

unul atrial
           
si unul ventricular

IZOLATE DIN PUNCT DE VEDERE ELECTRIC 🔌
In mod normal, exista o singura conexiune FUNCTIONALA electrica intre atrii si ventricule:

NODUL ATRIOVENTRICULAR SI CONTINUAREA SA: FASCICULUL ATRIOVENTRICULAR HIS

SISTEMUL CIRCULATOR

💪🏻MUSCULATURA inimii este alcatuita din 2️tipuri de celule musculare:


1️⃣ care initiaza si conduc impulsul🔌
2️⃣ care, pe langa conducerea impulsul, 📞raspund la stimuli prin contractie si care alcatuiesc miocardul de lucru❤️💪🏻

SISTEMUL CIRCULATOR

EXCITABILITATEA

Proprietatea celulei musculare de a raspunde la un stimul printr-un potential de actiune PROPAGAT!!

SISTEMUL CIRCULATOR

PARTICULARTATE A EXCITABILITATII INIMII

Este EXCITABILA numai in perioada de relaxare (diastola)

SISTEMUL CIRCULATOR

AUTOMATISMUL

  • Este proprietatea inimii de a se autostimula.

SISTEMUL CIRCULATOR

STIMULII cu frecventa mare nu pot tetaniza inima prin sumarea contractiilor.

Explicatia starii refractare a inimii rezida din forma particulara a potentialului de actiune a fibrei miocardice.

SISTEMUL CIRCULATOR

AUTOMATISMUL este generat in anumiti centrii (care au in alcatuirea lor celule care initiaza si conduc impulsurile)

1. NODULUL SINOATRIAL

  • frecventa descarcarilor: 70/80/min
  • ritm sinusal

2. NODULUL ATRIOVENTRICULAR

  • frecv. 40 potentiale/minut.
  • ritm nodal sau jonctional

3. FASCICULUL HIS SI RETEAUA PURKINJE.

  • frecv. 25 impulsuri/minut.
  • ritm idio-ventricular

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