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Air hunger resulting in labored breathing or difficult breathing, sometimes accompanied by pain.

Listening for sounds within the body, especially from the chest, neck, or abdomen.  Stethoscope is typically used.

A noninvasive diagnostic method that uses ultrasound to visualize cardiac structures.

Rapid, irregular electric activity in the atria, resulting in ineffective ejection of blood into the ventricles and an irregular ventricular respons.

Pertaining to illnesses whose cause is either uncertain or as yet undetermined.

Any disease that effects the heart muscle, diminishing cardiac performance.