Acquired Heart Disease

Systemic Hypertension may manifest electrocardiographically in the following manner:- Electrocardiographic signs of left venticular hypertrophy due to systolic overload Electrocardiographic signs of left atrial abnormality Left Axis Deviation because of chronic systemic hypertension ECG features of Left Ventricular Hypertrophy There are deep S waves in the right oriented leads Tall R waves in the left oriented lead The sum of S wave in leads V1 and R wave in lead V6 is 50mm ECG features of Left Ventricular systolic overload There is a wide frontal plane QRS-T angle T wave is inverted in Left oriented leads

Cardiac failure is not a disease but a manifestation of underlying disease of the heart or the circulatory system. Common causes of heart failure are coronary artery disease, cardiomyopathies, valvular heart disease and hypertensive heart disease. A normal ECG is very unlikely in a patient of left ventricular dysfunction and hyas a negative predictive value of over 90% for presence of heart failure. ECG abnormalities Examples of ECGs of patients with CHF:- Electrocardiograph shows the absence of RS complexes in the precordial leads, a QS pattern in V6, and an R wave in aVR which means patient has VT. ECG … Read more

Myocarditis is an under-recognised cardiac disease which can present from asymptomatic form to acute pump failure with gross ECG changes Myocarditis causes a diffuse, but patchy involvement of myocardium including atrium, ventricles and the conducting system. ECG Presentation of Mocarditis:- 1. Abnormalities of QRS complex Increase in QRS duration Bizzare intaventricular conduction defects Pathological Q waves and loss of R wave amplitude 2. STE or STD 3. Low to inverted T waves in left oriented leads 4. AV block of first degree is more common than higher degree AV blocks 5. Prolonged QT interval 6. Arrhythmias like Sinus Tachycardia Sinus … Read more

Acute Pericarditis ECG is an important finding to understand because it mimicks STEMI. Inflammation of the pericardium occurs due to various causes and characteristically presents with chest pain. ECG in pericarditis is further discussed under following headings: Acute Pericarditis ECG Acute pericarditis is caused due to autoimmune, infective or idiopathic reasons, most common being the idiopathic. Most common cause among the idiopathic reason is viral etiology. Acute pericarditis ECG findings are: Chronic Pericarditis with Pericadial Effusion ECG This may be the end result of certain forms of acute pericarditis but may be due to tuberculosis, myxoedema and malignancy. ECG changes … Read more