All are true regard to morphology of heart during myocarditis EXCEPT:

The microscopical changes in general it consists of inflammatory cells infiltrate as lymphocytes, mononuclear cells and even neutrophils, with degeneration and/or necrosis of myocytes.

Dilated cardiomyopathy occur at any age but it usually common between ages of
40-60 years.

All are true regard to Dilated cardiomyopathy except:

development of fragile mural thrombi and emboli caused by stasis of blood in cardiac chambers

The essential feature of hypertrophic cardiomyopathy is myocardial hypertrophy
which is most pronounced in the right ventricle and inter-ventricular septum.

this asymmetric hypertrophy is often associated with ventricular outflow
obstruction during systole, so it's called "idiopathic hypertrophic sub-aortic
stenosis" .

Ventricular dilation is common in Hypertrophic cardiomyopathy so left atrium may be dilated because of impaired diastolic filling of thickened rigid left ventricle

Restrictive cardiomyopathy:-
It's a disorder characterized by a primary decrease in ventricular compliance,
resulting in impaired atrium filling during diastole,

most common cause of decrease of compliance due to endomyocardial fibrosis.

persistent hypertension eventually can culminate in dysfunction, cardiac dilation, CHF, and even sudden death.

hypertensive heart disease most commonly affects the left side of the heart secondary to systemic hypertension, pulmonary
hypertension also can cause right-sided hypertensive changes—so-called ―cor
pulmonale.

Pericardial effusionis often asymptomatic if it
accumulate rapidly

most cause of effusions are congestive heart failure, hypoalbuminemia,
malignancy, and mediastinal lymphatic obstruction .

Congenital heart diseases: it's most
common cause of heart disease in adult.

Right _to _left shunts:-
is most common types of cardiac malformations,

Left-to-right shunts:- this is usually a cyanotic in early stage but in later stages can cause cyanosis when produced significant
pulmonary hypertension and reversal blood flow through the shunt occurs

Atrial septal defects:-
Is caused most commonly by failure to close of foramen ovale before birth.

foramen ovale is a flap of tissue in septum between 2 ventricle as a one-way valve
allowing blood to keep flowing from right to left during intrauterine life

Ductus arteriosus permits blood to flow freely
from the aorta to the pulmonary artery