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Samenvatting Alles over medische: ECG/ transfusie/ centrale katheter/ bloed
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Alles over medische: ECG/ transfusie/ centrale katheter/ bloed
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Prikkelgeleidingssysteem van het hart● Reguleren hartritme door elektrische impulsen door het hart te sturen
● Zorgt ervoor dat alle spiervezels vh hart op het juiste moment gecoördineerd samenwerken.
1) SA KNOOP: Elektrisch signaal wordt gegenereerd in de sinusknoop i.h rechter atrium (v. cava
superior)
2) Wordt verspreid via:
→ Atrioventriculaire knoop (AV knoop) → tssn boezem en kamer
Elektrische impulsen verder gestuurd naar:
→ Bundel van his
→ Purkinje vezels
3) Spiercellen van ventrikels aansturen
4) Samentrekking hart = effectief pompen van bloed
Dit proces zorgt voor een gecoördineerde pompactie vh hart + kan het bloed door het lichaam
circuleren
Elektrocardiogram:
→ registreert elektrische activiteit vh hart
, ECG lezen
P-golf: depolarisatie atria
(samentrekken voorkamers)
● Golf begint in SA-knoop; elektrische prikkel
wordt via hartspiercel doorgegeven
● Geleiding vindt plaats in RE + LI atria
QRS-complex: depolarisatie ventrikels
(samentrekken ventrikels)
● AV-knoop heeft de prikkel door → Bundel V His
T-golf: Repolarisatie
(relaxatie ventrikels)
3 groepen van afleidingen:
1) Extrimeit/ standaard:
2) Unipolair:
3) Borstwand/ precordialen:
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