This book will consider several clinical and interventional topics for which there is uncertainty, continued debate and/or no consensus based on current guidelines. While there are numerousguidelines in cardiology, new and on-going trials that address new drugs treatmentsand procedures raisemany unanswered questions. Furthermore, most practicing cardiologist taking care of the patients arelikely unable to digest all of these studies or guidelines and necessarily correctly apply them to their patients. If one considers in the guidelinesthe frequent use of Level C (consensus), there are many...