Cardiomyopathies, Myocarditis and Pericarditis Flashcards
What is the dysfunction in dilated cardiomyopathy?
Dysfunction in the heart’s ability to contract
Systolic failure
What are the clinical presentations of dilated cardiomyopathy similar to?
Those of heart failure
What two reasons are there that dilated cardiomyopathy has similar clinical presentations to that of heart failure?
Decreased ability of the heart to pump blood (Syncope)
Blood becomes backed up (Oedema)
What are the main causes of dilated cardiomyopathy?
Alcohol
Pregnancy
Genetic
Idiopathic
What investigations can be done in suspected dilated cardiomyopathy?
Circulating blood levels of BNP
Echo (shows chamber dilation, decreased EF)
ECG
CXR (Cardiomegaly)
In hypertrophic cardiomyopathy, what specifically is impaired?
Relaxation
A decrease in EDV leads to a decrease in what?
Outflow from the heart
What are the main signs and symptoms of hypertrophic cardiomyopathy?
Angina Palpitations Double apex beat Dyspnoea Syncope Can often be asymptommatic (sudden death)
When in suspicion of hypertrophic cardiomyopathy, when doing an echo, what would be seen?
An increase in septum: LV wall ratio (>1.3:1)
What is the main treatment for the relieving of symptoms in hypertrophic cardiomyopathy?
Beta-blockers
Verapamil
In restrictive cardiomyopathy, what are some of the underlying conditions which cause deposits in the heart muscle?
Amyloidosis
Sarcoidosis
In restrictive cardiomyopathy, what fails to relax?
The ventricles
What tests would you do if restrictive cardiomyopathy was suspected?
CXR (Pulmonary congestion and normal heart size)
BNP
Bloods
Echo (increased ventricular thickness)
What is the definition of myocarditis?
Acute or chronic inflammation of the myocardium
What can myocarditis cause?
Impaired myocardial function
Impaired myocardial conduction
Generation of arrhythmias