Cardiac Clinical Medicine Part 4: Syncope and Chronic Hypertension Flashcards
What is syncope?
A transient, self-limited loss of consciousness due to cerebral hypoperfusion
What are the three categories of syncope?
1) Neurally mediated syncope
2) Cardiac syncope
3) Orthostatic hypotension
What are some common syncope mimics?
1) Seizurie
2) Sleep disturbance (narcolepsy)
3) Head trauma
What is the causes syncope?
Reduced cardiac output and impaired oxygenation
What are the prodrome symptoms of neurally mediated syncope?
1) Abdominal pain
2) Diaphoresis
3) Blurred vision
4) Dizziness
5) Slowed pulse
Orthostatic hypotension occurs when there is reduction in systolic of?
OR
Diastolic BP of?
1) 20 mmHg or more
2) 10 mmHg or more
Orthostatic hypotension causes lightheadedness/dizziness when?
With sudden postural change
What are the prodrome symptoms of cardiac syncope?
1) Chest pain
2) Palpitations
If a patient with syncope shows an absence of focal neurological findings what testing has no benefit?
1) MRI and CT of the head
2) Carotid artery imaging
What type of syncope is tilt table testing useful for?
Reflex syncope (Type of Neurally mediated syncope)
When do we want to use stress testing?
When do we want to use transthoracic echocardiogram?
When do we want to use
electrophysiology studies?
1) Patients with exertional syncope
2) Suspected structural disease
3) Suspected arrhythmia
What device is used when a patient presents with cardiac symptoms that recur within 24-72 hours?
When symptoms recur within 2-6 weeks?
When symptoms are recurrent, infrequent, or have unexplained syncope of suspected arrhythmic origin?
1) Holter
2) Event monitor or external loop recorder
3) Internal monitor
What is the goal of treatment/management of neurally mediated syncope?
What is done to accomplish this?
1) Increase central blood volume and cardiac output
2) Physical counterpressure maneuvers of the limbs (leg crossing or handgrip and arm tensing)
What should be done in the treatment/management of syncope due to orthostatic hypotension?
Remove reversible causes (most commonly medications)
What should be done in the treatment/management of cardiac syncope due to bradyarrhythmias?
Due to tachyarrhythmias?
1) Cardiac pacing
2) Ablation, antiarrhythmic drugs, and cardioverter-defibrillators