Scientists are studying bats and their use of echolocation to learn more about how bats process information to understand and adapt to the world around them. Echoes of hunting They detect and catch their targets through echolocation, or biosonar, the animal equivalent--and precursor--to man-made sonars. How to see what whales hear: biomedical imaging reveals new insights into marine mammal ears
The faster repolarization of the cardiac action potential causes the tenting of the T waves, and the inactivation of sodium channels causes a sluggish conduction of the electrical wave around the heart, which leads to smaller P waves and widening of the QRS complex.
beagle, If your potassium was high at the time that was the case. The only way to tell would be to check your potassium level. However, it usually takes an abnormally (and often dangerously high level) to actually cause ECG changes. The ECG changes from hyperkalemia are fairly characteristic, but there are many causes of 'high' t waves such as those seen in young healthy patients, those seen from hypertension and those seen from ischemia.