W5 - CV System Flashcards
(49 cards)
What are the purposes of the CV system?
Blood transport around body
Regulation of body temp
Supports immune function
In the heart sounds, what is the “Lub”?
Closing of AV valves
In the heart sounds, what is the “Dub”?
Closing of SL valves
What can the SA node be broken down into?
Anterior internodal tract
Middle internodal tract
Posterior internodal tract
Bachmanns bundle
P wave
Atrial depolarisation
QRS complex
Ventricular depolarisation
T wave
Ventricular repolarisation
What initiates atrial depolarisation?
SA node
What does the flat part on an ECG between the end of P wave + the start of QRS complex represent?
Impulse being delayed by AV node.
At which part of the QRS complex does ventricular depolarisation happen?
At apex
Where on an ECG graph does it show where ventricular depolarisation is complete?
Flat part between S of QRS complex + start of T wave
Where on an ECG graph does ventricular repolarisation begin?
At apex of T wave
Where on an ECG graph does it show that ventricular repolarisation is complete?
Flat part after T wave
Resting HR for untrained females + males
~70 bpm
Resting HR for trained females + males
~50 bpm
Resting HR for bradycardia
Less than 60 bpm
Resting HR for tachycardia
More than 100 bpm
How is SV calculated?
End diastolic vol - end systolic vol
Resting values for SV in untrained females
50ml
Resting values for SV in untrained males
70ml
Resting values for SV in trained females
80ml
Resting values for SV in trained males
110ml
Define the Ejection Fraction (EF)
Proportion of blood pumped out of left ventricle w/ each beat
(%)
Average ejection fraction at rest
60%