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When it comes to cardiovascular health, medical terms can easily get confusing. People often use Heart Attack, Cardiac Arrest, and Arrhythmia interchangeably, assuming they all mean the same thing. However, in medical science, these are distinct conditions affecting different systems of the heart. (Heart Health: Heart Attack vs. Cardiac Arrest and Arrhythmia | Understanding) Understanding these differences is crucial—it can help you recognise symptoms early, seek the right medical help, and potentially save a life. Heart Health: Heart Attack vs. Cardiac Arrest and Arrhythmia | Understanding 1. The Heart as a House: Plumbing vs. Electricity To make it easy to understand, think of your heart like a modern house: The Plumbing System: The blood vessels (coronary arteries) that deliver oxygen-rich blood and nutrients to the heart muscle. The Electrical System: The internal signals that control the rhythm and speed of your heartbeat. With this analogy in mind, let’s break down the main condi...

Diseases of Blood 1. Basic Concepts & Definitions Anemia: Introduction: A condition characterised by a decrease in hemoglobin (Hb) levels or total Red Blood Cell (RBC) count, resulting in reduced oxygen delivery to tissues . Definition: A blood disorder marked by a decreased oxygen-carrying capacity of the blood . Normal Haemoglobin Levels: Males: 14-18 \text{ g/dL} Females: 12-15 \text{ g/dL} Types of Anemia & Etiology Iron Deficiency Anemia: The most common type of anemia, caused by inadequate iron supply needed for hemoglobin production in the bone marrow . Causes: Low dietary iron intake, chronic blood loss, and pregnancy . Megaloblastic Anemia (Vitamin $B_{12}$ / Folate Deficiency): Caused by a lack of Vitamin $B_{12}$ or Folic acid, which are essential for normal DNA synthesis and RBC maturation, leading to defective RBC production . Aplastic Anemia: A severe, life-threatening condition where bone marrow stem cells fail to produce sufficient blood cells...