Cardio Revision Flashcards
Which valves are atrioventricular valves
Mitral
Tricuspid
Which valves are Semilunar Valves
Aortic
Pulmonary
Is Pulmonary circulation Oxygenated
No
Is Systemic circulation oxygenated
yes
Where do the coronary arteries originate from in the aorta
Coronary Ostia
What is the cardiac cycle
the time between ventricular contractions nd ventricular relaxation
What is stroke volume
volume of blood being pumped out of the ventricles in a single beat
What is normal cardiac output
how do you calculate it?
4-8L/min
CO = SV x HR
What is Pre-load
volume of the ventricular myocardium at the end of diastole
What is After-load
Pressure against the left ventricle during systole to open the aortic valve
Where do electrical conductions in the heart begin from
SA node
What is the P wave
Atrial depolarisation (contraction)
What is the QRS complex
ventricular depolarisation, atrial repolarisation
What is the T wave
ventricular repolarisation (resting phase)
How many seconds does one large square on ECG paper account for
0.2secs
How to calculate HR from ECG
Count no. QRS within 6 seconds then x10
What is a normal PR interval
0.12-0.2sec
(treasured form onset of P wave to onset of QRS complex
What is a normal QRS complex
0.06-0.12 sec
What is the the bpm of normal sinus rhythm?
60-100bpm
