In one patient, true atrial undersensing was present; in the others, sensing of the atrial electrode was appropriate, but sensing of sinus P waves was intermittently blocked by normal pacemaker operation. In this report we discuss the electrocardiographic diagnosis of atrial undersensing in order ...
Troponin: Obtained in the emergency setting during acute decompensated HF to determine the presence of acute coronary syndromeCardiopulmonary tests: ECG : Detects abnormalities in cardiac rhythm and conduction Can show increased QRS voltage in leads I and aVL, Q waves, and ST- and T-wave ...
Friedreich’s Ataxia, caused by frataxin gene alteration, results in central sensory pathway dysfunction, leading to progressive gait and limb ataxia, dysarthria, areflexia, decreased vibration sense, and muscle weakness [57]. Cardiac involvement includes LVH progression to systolic dysfunction and arrhy...
Support vector machines (SVMs) [32,33] look for the set of support vectors that allow to build the optimal discriminating surface in the sense of providing the greatest margin between classes. In this way, the decision function can be expressed in terms of the support vectors only: ...
In that sense, Group B presented the most sever changes in this property. The reason for a different local electro-mechanical delay can be multivariate: β-adrenergic stimulation is drastically deranged during HF, but intriguingly a role of β3 receptors has been shown to compensate β1 de-...
Heart failure is a chronic disease, the symptoms of which occur due to a lack of cardiac output. It can be better managed with continuous and real time monitoring. Some efforts have been made in the past for the management of heart failure. Most of these
Moreover, patients with more than one comorbidity were less frequently receiving MRAs, which may be related to the potential higher risk of side effects in this population [17]. In this sense, it is necessary to have a better understanding of the comorbidities in patients with HF to establish...
FIG. 2 is a functional block diagram of an exemplary implantable stimulation device illustrating basic elements that are configured to provide cardioversion, defibrillation, pacing stimulation and/or other tissue and/or nerve stimulation. The implantable stimulation device is further configured to sense in...
The invention provides a sensor for measuring both impedance and ECG waveforms that is configured to be worn around a patient's neck. The sensor features 1) an ECG system that inclu
Pacemaker Failure and ECGBleifer, Daniel J.Annals of Internal Medicine