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).

A recent study has mathematically clarified how the presence of crystals and gas bubbles in magma affects the propagation of seismic P-waves. The researchers derived a new equation that ...

"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 ...

Researchers have mathematically elucidated how the presence of crystals and gas bubbles in magma affects the propagation of seismic P-waves. A novel equation was derived to describe the travel of ...