Final answer:
The effective statement by the new nurse regarding oxygen usage for angina indicates understanding that angina pain is due to decreased oxygen supply to heart cells. Oxygen therapy helps to alleviate ischemia in cardiac tissues, which is a crucial aspect of the immediate management of angina and myocardial infarction.
Step-by-step explanation:
The statement by the new nurse that indicates effective teaching about the use of oxygen for clients with angina pectoris is: "The pain of angina pectoris occurs because of a decreased oxygen supply to heart cells." Angina is chest pain or discomfort that occurs when an area of your heart muscle doesn't get enough oxygen-rich blood. It is often prompted by physical activity or stress and usually goes away with rest or medication such as nitroglycerin, which is a vasodilator that helps to improve blood flow and oxygen delivery to the heart muscle.
Oxygen therapy is used in the medical management of angina and myocardial infarction (MI) because it can help increase the supply of oxygen to the heart muscle, thereby reducing ischemia and pain. Supplemental oxygen is a vital immediate treatment for MI, along with aspirin and nitroglycerin. In cases of severe coronary artery disease leading to angina or heart attacks, additional treatments such as thrombolytic therapy, angioplasty, stenting, or bypass surgery may be necessary to restore adequate blood flow to the myocardium.