Week 6 Flashcards
What is an ECG?
Electrocardiograph
- it is the electrical conduction of the heart.
What is the P wave?
The P wave is the SA node firing and atrial depolarisation.
Contraction=atrial systole
What is the PR interval?
PR interval is the impulse travel time
What is the QRS complex?
This is the depolarisation from the AV node through the ventricles.
(Contraction=ventricular systole)
What is the ST segment?
This is the start of repolarisation.
What does the T wave represent?
The T wave represents ventricular repolarisation.
(Refill=ventricular diastole)
Resting
What does the QT interval represent?
This is the total time for ventricular depolarisation & repolarisation.
If present what does the U wave represent?
Part of the latter phase of ventricular repolarisation.
What is the management of arrhythmias?
- treat the cause
- medication
- defibrillation/cardio version
- pacemaker
- cardio conduction surgery
What are some of the complications that can arise with arrhythmias?
-weakness/fatigue
-heart failure
-Thrombo-embolic event
-cardiac arrest
-death
This is all dependant on the rhythm.
What is a Myocardial Infarction (MI)?
A myocardial infarction arises when a region of the myocardium becomes irreversibly necrosed.
It is due to thromboembolic occlusion of the coronary artery supplying that area of the heart muscle.
When assessing chest pain what is the PQRST evaluation?
P-precipitating factors Q-quality R-radiation S-severity T-time of onset
How are we diagnosing a pt with chest pain?
- pt Hx
- symptoms
- ECG
- bloods= (ensuring they aren’t aenemic) looking at their Troponin levels and cardiac enzymes
What nursing observations/monitoring would you be conducting?
- reassuring the pt
- baseline obs
- is there a need for cardiac monitoring
- 12 lead ECG
- IV access
- Troponin levels and cardiac enzymes screening
- Contacting the Dr.
What does ABCD for initial care stand for?
A-airway
B-breathing
C-circulation
D-disability