Today, Dr. Abhishek Shukla discussed how to differentiate the cause of breathing difficulty between cardiac and respiratory conditions. The first and most important step is detailed history taking, which provides valuable clues about the onset, duration, and associated symptoms. For example, a patient with asthma or COPD often has a history of cough, wheezing, or exposure to allergens, while a cardiac patient may report orthopnea (difficulty breathing while lying flat) or paroxysmal nocturnal dy