3 Cardiac Enlargement Increase amount of cardiac tissue How would this affect amount of depolarization?How could that affect an ECG?
4 Right Atrial Abnormality Overload of the right atriadilationhypertrophyIncrease voltage of the P wave
5 Right Atrial Abnormality Normal P wave amplitude is less than 2.5 mm and seconds in width.Abnormal P waves are typically taller than 2.5 mm but not longer the 0.12 sec.
6 Right Atrial Abnormality Causes:Pulmonary diseaseCongenital heart disease
7 Right Atrial Abnormality Tall P waves in any of the following leads:II, III, aVF or sometimes V1.
8 Right Atrial Abnormality P pulmonaleartial enlargement due to severe pulmonary diseaseAtrial enlargement can occur in the absence of tall P waves.
9 Left Atrial Abnormality Left atria normally depolarizes after the right atria.Left atrial enlargement should prolong the P wave greater than 0.12 sec.P wave height may be normal or increased
10 Left Atrial Abnormality CAD may produce wide P waves without left atrial enlargement.
11 Left Atrial Abnormality Leads I and/or II may show notched P waves(second hump due to delayed depolarization of the left atrium)(P mitrale: mitral valve disease)V1 may show a bi-phasic P wavenegative part is > 0.4 sec. or 1 mm in depth(right atria is anterior to the left atria)
12 Left Atrial Abnormality Causes:Valvular heart diseaseHypertensive heart diseaseCardiomyopathiesCAD
13 Right Ventricular Hypertrophy What do you think will happen to the ECG with ventricular hypertrophy?