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Questions and Answers
Qual factor pote afectar le excitabilitate del musculo cardiac, influentiante su capacitate de responder a stimulos?
Qual factor pote afectar le excitabilitate del musculo cardiac, influentiante su capacitate de responder a stimulos?
- Le presentia de electrocardigrammas (ECG).
- Solmente le systema nervose autonomic (ANS).
- Solmente hormonos como thyroxina e adrenalina.
- Le systema nervose autonomic (ANS) e hormonos como thyroxina e adrenalina. (correct)
Qual componente del systema conductive cardiac causa un retardo de approximativemente 0.13 secundas in le transmission de impulsos?
Qual componente del systema conductive cardiac causa un retardo de approximativemente 0.13 secundas in le transmission de impulsos?
- Le fascio de His.
- Le fibras de Purkinje.
- Le nodo atrioventricular (AVN). (correct)
- Le nodo sinoatrial (SAN).
Que representa le electrocardigramma (ECG)?
Que representa le electrocardigramma (ECG)?
- Un mesuration directe del contraction mechanic del corde.
- Un mesuration del fluxo sanguinee trans le vasos coronari.
- Un analyse del concentration de oxygeno in le sanguine.
- Un registro graphic del potentiales electric generate per le corde. (correct)
Qual del sequente structuras cardiac generalmente initiara le impulso a un rhythmo de 90-110 bpm?
Qual del sequente structuras cardiac generalmente initiara le impulso a un rhythmo de 90-110 bpm?
Qual processo es afficite per factores inotropic positive e negative?
Qual processo es afficite per factores inotropic positive e negative?
Qual function servi le circulation pulmonar?
Qual function servi le circulation pulmonar?
Como le pharmacos que affice le influxo de calcium influentiara le contractilitate cardiac?
Como le pharmacos que affice le influxo de calcium influentiara le contractilitate cardiac?
Si le nodo sinoatrial (SAN) functiona defectuosmente, qual altere componente del systema conductive cardiac pote initiar un impulso, e a qual rhythmo approximative?
Si le nodo sinoatrial (SAN) functiona defectuosmente, qual altere componente del systema conductive cardiac pote initiar un impulso, e a qual rhythmo approximative?
Flashcards
Excitabilitate cardiac
Excitabilitate cardiac
Capacitate de responder a stimulos e generar un action potential.
Conductivitate cardiac
Conductivitate cardiac
Transferer de impulsos electric via le systema conductive cardiac.
Electrocardiogramma (ECG)
Electrocardiogramma (ECG)
Un registration graphic del potentiales electric del corde.
Automaticitate cardiac
Automaticitate cardiac
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Contractilitate cardiac
Contractilitate cardiac
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Circulation pulmonar
Circulation pulmonar
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Circulation systemic
Circulation systemic
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Nodos Cardiac
Nodos Cardiac
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Study Notes
- Cardiac muscle properties are illustrated using a heart, cardiac physiology, and ECG
Excitability
- The ability to respond to stimuli is key
- It generates a propagating action potential
- This is followed by a contraction
- The autonomic nervous system (ANS) affects this
- Hormones like thyroxine and adrenaline affect this as well
Conductivity
- It involves the transfer of impulses
- This transfer occurs via the cardiac conductive system
- The system includes the sinoatrial node (SAN)
- It includes the atrioventricular node (AVN) with a 0.13 second delay
- It also includes the Bundle of His
- Also includes Purkinje fibers
Electrocardiogram (ECG):
- It involves graphic recording of electrical potentials
- Limb leads (standard and augmented) are used
- Chest leads (V1-V6) are used
- The ECG uses 12 leads in total
- Interpretation is vector direction based
Automaticity
- The ability to initiate own impulses is noted
- It is regular and spontaneous
- Independent of nerve supply
- Due to self-excitable fibers
- Sinoatrial Node (SAN) rate is 90-110 bpm
- Atrioventricular Node (AVN) rate is 60 bpm
- Purkinje Fibers rate is 30 bpm
- Ventricular Muscle rate is 25 bpm
Contractility
- Conversion of electrical impulses to mechanical energy occurs
- Systole (contraction) occurs
- Diastole (relaxation) occurs
- Positive inotropic factors affect this
- Negative inotropic factors affect this
- The nervous system (ANS) affects this
- Chemical factors (hormones, drugs) affect this
- Physical factors (temperature) affect it also
Circulation
- Pulmonary circulation involves deoxygenated blood to the lungs
- Systemic circulation involves oxygenated blood to the body
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Description
Le musculo cardiac demonstra proprietates de excitabilitate, conductivitate, automaticitate. Le electrocardiogramma (ECG) registra le potentiales electric. Le interpretation de ECG es basate super le direction de vectores.
