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To overcome this potential limitation, other pacing sites throughout the whole septal segments have been tried. This delay is accompanied with LV dyssynchrony, and the development of LV dyssynchrony was reported to be associated with deterioration of heart failure symptoms and the systolic LV dysfunction. However, it induces non-physiologic left ventricular (LV) activation with alteration of the intraventricular contraction sequence, which delays LV activation. Right ventricular (RV) apical pacing allows for safe and stable long-term pacing. To optimize the pacing site in the septum, assessment of the paced QRS vector in leads I and III is of a great benefit especially when combined with paced QRS complex duration assessment. By contrast, different septal sites showed no significant difference of the paced QRS complex duration. There was a significant difference found between the three septal pacing sites concerning the patient functional capacity with superiority of high septal location. The study showed that paced QRS complex duration itself has no significant difference between the different septal pacing locations ( P-value 0.675), although its combination with the paced QRS complex vector can signify the optimal pacing site and 6MWT showed a significant difference among the groups in favor of group 1 group 1 (413.3 ± 148.5), group 2 (359.8 ± 124.6), and group 3 (276.0 ± 98.5) P value 0.04. Their clinical status was assessed 6 months after device implementation using 6-min walk test (6MWT). Patients were randomized according to RV pacing site RV into group 1 “high septum” ( n = 15), group 2 “mid septum” ( n = 25), and group 3 “low septum” ( n = 10) using QRS vector and duration as well as fluoroscopic parameters. Resultsįifty patients who received a single lead pacemaker with assumed > 90% pacemaker dependency. This study aimed at investigating the relation between various septal locations guided by ECG and fluoroscopy and the intermediate term functional capacity of the patients.
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Learn more about CPR and how to do CPR.Right ventricular apical pacing with the resultant left ventricular dyssynchrony often leads to depressed systolic function and heart failure.Read more about heart attacks and learn about heart attack symptoms.Find out about heart attacks, effects and what you should do.A heart attack and a cardiac arrest are both emergency situations.This is because a person who is having a heart attack may develop a dangerous heart rhythm, which can cause a cardiac arrest. Many cardiac arrests in adults happen because of a heart attack.A cardiac arrest is when a person’s heart stops pumping blood around their body and they stop breathing normally.The heart muscle is robbed of its vital blood supply and, if left untreated, will begin to die because it is not getting enough oxygen. A heart attack is when one of the coronary arteries becomes blocked.
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