There are P waves (+) with regular PP intervals and a rate of 85 beats/min. The P waves have a normal morphology; they are positive in leads I, II, aVF, and V4-V6. This is a stable normal sinus ...

The P waves are positive in leads I, II, aVF, and V4-V6. Hence, this is a sinus tachycardia and there is a second-degree atrioventricular (AV) block (defined as an occasional nonconducted P wave).

"P" or primary waves are the fastest kind of seismic wave -- the ones felt first when an earthquake occurs. Their 10-12 second warning before major shaking begins may provide just enough time to ...

S waves are more dangerous than P waves because they have greater amplitude and produce vertical and horizontal motion of the ground surface. The slowest waves, surface waves, arrive last. They travel ...

The P waves are positive in leads I, II, aVF, and V4-V6. Hence, this is a sinus tachycardia and there is a second-degree atrioventricular (AV) block (defined as an occasional nonconducted P wave). The ...