tailieunhanh - Ebook Easy ECG: Interpretation - Differential diagnosis: Part 2

(BQ) Part 2 book "Easy ECG: Interpretation - Differential diagnosis" presents the following contents: Coronary heart disease and myocardial infarction, other ECG changes. Invite you to consult. | 97 4 Coronary Heart Disease and Myocardial Infarction 98 4 Coronary Heart Disease and Myocardial Infarction Right and Left Coronary Arteries 7 8 9 Right coronary artery RCA 1 Supply Parts of the lateral and posterior wall atria sinus and AV node Branches - Before crux cordis Atrial branches right atrial branches 2 Right ventricular branches 3 Marginal branches 4 Division at the crux cordis Posterior interventricular branch 5 Posterior lateral branches one to three branches 6 Left coronary artery LCA main branch 7 Supply Of the anterolateral anterior wall of the ventral and apical septum parts of the lateral and posterior wall atria sinus and AV node Branches - To the anterior wall leftanteriordescending artery LAD 8 - To the lateral wall circumflex branch RCX 9 Left Anterior Descending Artery and Circumflex Artery 1 3 4 5 6 Left anterior descending artery LAD 1 Supply Of the anterolateral wall of the ventral and apical septum Branches - To the septum septal branches 2 - To the anterolateral wall diagonal branches 3 Circumflex branch RCX 4 Supply Of parts of the lateral and posterior wall of parts of the atria sinus and AV node Branches - Side branches of proximal origin marginal branches 5 - Side branches of distal origin posterolateral branches 6 - In very large RCX also posterior interventricular branch otherwise belongs to the RCA Stress-Induced Ischemia in Coronary Heart Disease 99 Stress-Induced Ischemia in Coronary Heart Disease Rest Stress Mechanism - In the affected area the inner myocardial layer endocardium is particularly susceptible to ischemia so-called last meadows under stress reduced perfusion with decreased electrical excitability ischemic area becomes electropositive compared to the rest of the myocardium thereby flow of charge from the healthy electronegative myocardium to the ischemic zone Etiology - Coronary heart disease with at least one significant stenosis Treatment - Interventional PCTA bypass - Medications ASA beta-blocker nitrate .