Palpitations are sensations of irregular heartbeats. Heart functions as two-stage electrical pump. SA node acts as pacemaker generating 60-80 beats/minute. AV node delays signal to allow ventricle filling
Pericarditis shows diffuse ST elevation and PR depression in all leads. Spodick's sign is seen in 80% of pericarditis patients. STEMI differs from pericarditis by having convex or horizontal ST elevation
Normal adult resting heart rate is between 60 and 100 bpm. Heart rate varies by age, health and lifestyle factors. Counting after 5-10 minutes of rest is recommended
LGL is characterized by short PR interval and normal QRS duration. First described in 1938 by Clerc et al, re-identified in 1952 by Lown et al. Syndrome includes paroxysms of tachycardia and accessory pathway
Textbook covers mechanisms of cardiac contraction and relaxation. Discusses pathophysiology of heart failure and left ventricular remodeling. Provides comprehensive approach to patient assessment and management. Covers diagnosis and treatment of acute and chronic heart failure
WPW is a congenital accessory pathway with tachyarrhythmia episodes. First described in 1930 by Wolff, Parkinson and White. Incidence ranges from 0.1 to 3.0 per 1000. Associated with small risk of sudden cardiac death