Phasic Sinus Arrhythmia - ECG Diagnosis • The rate increases with respiration and decreases with expiration. • As the heart rate increases, the P wave amplitude increases (II, Ill and aVF). • As the heart decreases, the P wave amplitude decrease. • The heart rate change is gradual and rhythmic. #phasic #Sinus #Arrhythmia #cardiology #diagnosis #ekg #ecg #electrocardiogram