What is the main reason for angina pectoris?

RRB Staff Nurse Delhi-2015

Medical Surgical Nursing

Easy

Appeared in: RRB Staff Nurse Delhi-2015

Explanation

Angina pectoris is a clinical syndrome characterized by chest pain or discomfort.
It is caused by transient myocardial ischemia, which is a temporary lack of blood and oxygen to the heart muscle.
This ischemia results from an imbalance between myocardial oxygen supply and demand, most commonly due to atherosclerosis, a form of cardiac disease.

Option A: While nerves transmit the pain signals of angina, the underlying pathology is in the heart's blood supply, not a primary disease of the nervous system.
Option B: Gastric diseases like GERD can cause chest pain (heartburn) that mimics angina, but the origin is the esophagus and stomach, not the heart.
Option C: Respiratory diseases cause chest pain that is typically sharp and changes with breathing (pleuritic), which is different from the pressure-like pain of angina.

Visual 1: Diagram: An illustration showing a coronary artery partially blocked by atherosclerotic plaque, with a text overlay explaining how this limits blood flow and causes an oxygen supply/demand mismatch during exertion.
Visual 2: Flowchart: A simple flowchart demonstrating the progression: Risk Factors -> Atherosclerosis -> Narrowed Coronary Artery -> Increased Myocardial Oxygen Demand (e.g., exercise) -> Myocardial Ischemia -> Angina Pectoris.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pathophysiology of Angina Pectoris as background academic context rather than a clinical decision trigger.
A nurse's primary role during an episode of suspected angina is rapid assessment and intervention to reduce myocardial oxygen demand and improve supply. This includes administering prescribed nitroglycerin, ensuring the patient is at rest, and obtaining a 12-lead ECG.
Patient education is critical. Nurses must teach patients to recognize angina symptoms, understand how to use nitroglycerin, and know when to seek emergency medical help (e.g., if pain is not relieved by rest and 3 doses of nitroglycerin).
What if? If a patient's chest pain is not relieved by rest or nitroglycerin and persists for more than 15-20 minutes, it should be treated as a potential myocardial infarction (heart attack), and emergency services must be activated immediately. This is a key differentiator between stable angina and a more severe acute coronary syndrome.

How to Approach the Question

First, identify the key term in the question: 'angina pectoris'.
Recall the definition and underlying cause of this condition. Angina is fundamentally a problem of blood flow to the heart muscle.
Evaluate the options based on this core knowledge. Which option represents the organ system involved in blood flow to the heart?
Option A (Neurological), B (Gastric), and C (Respiratory) relate to other body systems that can cause chest pain but are not the primary origin of angina.
Option D (Cardiac) directly relates to the heart and its blood vessels (coronary arteries), which is the correct origin of the problem.
Therefore, select the option that points to the heart as the source of the disease process.

Concept Tested & Keywords

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