Week 6 mix (ECG, Haemodynamics) Flashcards
Define Resistance (haemodynamics)
Opposition or impedence to blood flow principally as a result of the force of friction between blood cells and proteins and blood vessel walls
Which patients would require ECG or cardiac monitoring?
Cardiac arrest, Arrhythmias, Chest pain, Heart failure, Collapse/syncope, Shock/hypotension, Palpitations, Breathing difficulty
What is the Action potential responsible for?
Depolarisation of the cardiac muscle
How is the Action potential created?
Ion exchange involving potassium & calcium
What are some examples of Invasive haemodynamic monitoring?
Systemic arterial pressure monitoring, Central venous pressure, Pulmonary artery pressure, Cardiac output (thermodilution)
Why do we invasively measure arterial blood pressure?
Continuous monitoring, sensitive and accurate assessment of effectiveness of treatment, allows repeated samples of blood and gases.
What is Central venous pressure?
The measure of the pressure of blood within the right side of the heart
What is normal cellular activity dependant on?
Oxygen, Nutrients, other chemicals, removal of waste products
What is haemodynamic monitoring?
The study of the movement and forces of blood within the cardiovascular system, using sophisticated equipment and/or special catheters
(ECG) QRS =
Ventricular depolarisation (
P wave =
Depolarisation to trigger atrial contraction
T wave =
Ventricular repolarisation (return of nerve to resting state)
What are the 6 steps to ECG rythym analysis?
Is there a pulse? Is there electrical activity? Wat is QRS rate? Is QRS wide/narrow? Is atrial activity present (p waves)? What is relationship between atrial and ventricle activity (p waves and QRS complex)?
