Describe the characteristic pathologic features of heart and lungs found in congestive heart failure. 

• The heart is enlarged.
• Changes in cardiac chambers and myocardium depend on the etiology of heart failure.
• Irregular fibrosis replaces the myocardium.  
• The lung shows severe, chronic passive congestion.  
• Vessels, including the alveolar capillaries, are congested as a result of pulmonary venous hypertension.
• Alveoli contain numerous hemosiderin laden macrophages.

	This photograph depicts a large, globular heart of dilated cardiomyopathy.
	The frothy liquid oozing from the cut surface of the lung is caused by air moving through water in the respiratory tree.