SOPHÒS 455

Dual chamber pacemaker based on an efficient microprocessor technology. Sophòs 155 is characterized by an accelerometric sensor for rate modulation according to patient’s chronotropic needs, and by an hemodynamic signal based on Trans Valvular Impedance (TVI).
Such characteristics, with a wide range of programmable parameters and functions, allow an effective optimization of therapy for each patient.
In addition to all the functions available in other models of Sophos family, Sophos 455 includes new special functions and useful additional features

Special Functions
• Automatic implant recognition
• Automatic polarity switch
• AF Prevention: Spontaneous atrial activity suppression
• Ventricular pacing reduction with haemodynamic check
• Energy trend of ventricular impulse variation
• Automatic pacing threshold analysis by TVI with markers and TVI visualisation
• High quality detection, storage and measurement of Trans-Valvular Impedance for a comparison of ventricular mechanical performance in the long term
• Ejection check after ventricular pacing
• Ejection check after ventricular sensing
• Diagnostics on Trans Valvular Impedance data and cardiac contractility

Trans-Valvular Impedance TVI
The TVI signal (Trans Valvular Impedance) is measured between right atrium and right ventricle.
The possibility to choose the electrodic configuration to measure signal and the auto-calibration current system in order for such detection, allow to obtain an optimal signal in every implant, also in those cases of elective pacemaker substitution.
The sensor detects, cycle by cycle, the effective mechanical heart contraction, allowing to realize the functions of permanent ventricular ejection check with automatic adjustment of pacing energy in case of loss of capture (ejection check after ventricular pacing) and protection in case of oversensing with an automatic safety pacing in case of external interferences (ejection check after ventricular sensing).
Furthermore, it’s possible to obtain an hemodynamic monitoring of the patient, thank’s to the long term storage capacity: in case of decay of hemodynamic performance an appropriate warning will be visible to the user on the programmer’s screen.

Diagnostic
Long term monitoring of ventricular mechanics: TVI sensing provides the opportunity to monitor the mechanical performance of the hearth in acute conditions as well as in the long term.
A wide diagnostic section, managed easily by programmer, allows to obtain all necessary information for an optimal pacemaker operation according to patient’s requirements.

 

“The best human action is to be useful to neighbour” (SOFOCLE)

 

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