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Mintek LV, LV-T 2.4.2 Sensitivity, 2.4.3 Lead Polarity

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Stratos LV/LV-T Technical Manual 83

CAUTION

Pulse Amplitude – Programming of pulse amplitudes, higher than 4.8 V, in combination with long pulse widths and/or high pacing rates can lead to premature activation of the replacement indicator. If a pulse amplitude of 7.2 V or higher is programmed and high pacing rates are reached, output amplitudes may differ from programmed values.

Programming Modifications – Extreme programming changes should only be made after careful clinical assessment. Clinical judgment should be used when programming permanent pacing rates below 40 ppm or above 100 ppm.

2.4.2 Sensitivity

The parameter “sensitivity” is used to set the pulse generator’s threshold for detecting intracardiac signals. The lower the programmed sensitivity values the higher the device’s sensitivity.

If intracardiac signals are of low amplitude, a change to a higher sensitivity (lower value) may be indicated. Conversely, if the sensing amplifier is responding to extraneous signals, such as artifacts or interference, a change to a lower sensitivity (higher value) may resolve the difficulty. In dual chamber sensing modes, the sensitivity values for the atrial and ventricular channels are independently programmable. With Unipolar programming, the highest possible sensitivity setting is 1.0 mV.

2.4.3 Lead Polarity

The programmed lead polarity determines whether the CRT-P senses or paces in a unipolar or bipolar configuration. Lead polarity can be programmed separately for sensing and pacing in all three chambers.

CAUTION

Atrial Sensitivity – In dual chamber systems, the atrial sensitivity of 0.1 mV should only be programmed in conjunction with a bipolar lead configuration.

Contents

Family of Cardiac Resynchronization Therapy Pacemakers CAUTION Contents Page Page 9. Elective Replacement Indication (ERI) Page Page 1. General 1.1Device Description 1.2Indications 1.3Contraindications 1.4Note to Physician 1.5Warnings and Precautions 1.5.1 Interactions with Other Medical Therapy Page 1.5.2 Storage and Sterilization 1.5.3 Lead Connection and Evaluation 1.5.4 Programming and Operation AV Hysteresis Sensing – AV Conduction Unipolar/Bipolar bipolar Page 1.5.5 Home Monitoring Page 1.5.6 Electromagnetic Interference (EMI) 1.5.7 Home and Occupational Environments 1.5.8 Cellular Phones 1.5.9 Hospital and Medical Environments 1.5.10 Device Explant and Disposal 1.6Potential Effects of the Device on Health 1.7Clinical Studies 1.7.1 Stratos LV Clinical Study – AVAIL CLS/CRT Page Clinical Inclusion Criteria Clinical Exclusion Criteria Follow-UpSchedule Clinical Endpoints Accountability of PMA Cohorts Figure Figure 1: Patient Accountability Demographics and Baseline Parameters Table Table 1: Patient Demographics at Enrollment Page Table 2: Atrial Fibrillation Demographics at Enrollment Page Table 3: Current Cardiac Medications at Enrollment Safety and Effectiveness Results Page Primary Endpoint—Complication-freeRate (Safety) Page Other Medical 13.3% Total—All 25.3% Patients and Page Page Page 46.7% 60.0% Table 7: Summary of Patient Deaths All Causes Primary Endpoint: Six Minute Walk Test & QOL (Effectiveness) Table 8: Composite of Six Minute Walk Test and QOL (Effectiveness) (N = 53) Distance Walked at Baseline Primary Effectiveness Endpoint Analysis and Conclusions Multi-sitePoolability and Gender Analysis 1.7.2 Stratos LV Clinical Study – OVID study Page Page Page Page Table 10: Summary of Complications at 6 months 3.3% Atrial Lead Related 1.1% 5.6% Page 13.5% 19.1% Observation 1.7.3AVAIL and OVID Combined Primary Endpoint-Complication-freeRate (Safety) 1.2% 1.8% 12.8% 17.7% Categtories 1.7.4Tupos LV/ATx Clinical IDE Study - OPTION CRT/ATx Page Page Page Figure 2: Patient Accountability Table 13: Patient Demographics at Pre-Enrollment N=133 N=67 value Table 14: Cardiac Medications at Pre-Enrollment Drug (N=133) (N=67) Specific CHF Medications Primary Endpoint 1: Six Minute Walk Test & QOL (Effectiveness) Table 15: Composite of Six Minute Walk Test and QOL P-value Distance ∆ in QOL Score† Secondary Endpoint Results Table 16: Six Minute Walk Distance Six-Month Table 17: Improvement in NYHA Classification at Six-Monthsfrom Baseline Page 1.7.5 Conclusions Drawn from Studies Page 2. Programmable Parameters 2.1Pacing Modes 2.1.1 Rate-adaptiveModes 2.1.2 DDD Table 18: Timing Intervals Timing Event Interval Vsp Trigger Pacing Demand Pacing Triggered pacing Page 2.1.3 DDI NOTE: 2.1.4 DVI 2.1.5 VDD 2.1.6 AAI and 2.1.7 AAI 2.1.8 AOO, VOO 2.1.9 DOO 2.1.10 VDI 2.2Biventricular Synchronization of the Stratos CRT-Ps 2.3Timing Functions 2.3.1 Basic Rate 2.3.2 Rate Hysteresis 2.3.3 Scan Hysteresis Figure 3. Scan Hysteresis NOTES: 2.3.4 Repetitive Hysteresis 2.3.5 Night Mode 2.3.6 Refractory Periods 2.3.7 Atrial PMT Protection 2.3.8 Ventricular Refractory Period 2.3.9 AV Delay 2.3.9.2AV Hysteresis 2.3.9.3AV Repetitive Hysteresis 2.3.10VES Discrimination after Atrial Sensed Events 2.3.11 Sense Compensation 2.3.12 Ventricular Blanking Period 2.3.13 Safety AV Delay 2.4Pacing and Sensing Functions 2.4.1 Pulse Amplitude and Pulse Width 2.4.2 Sensitivity 2.4.3 Lead Polarity 2.5Automatic Lead Check Lead Check 2.6Antitachycardia Functions: 2.6.1 Upper Rate and UTR Response 2.7Wenckebach 2:1 Wenckebach Behavior 2:1 Behavior 2.8Mode Switching 2.9PMT Management 2.9.1 Protection 2.9.2 PMT Detection 2.10 Adjustment of the PMT Protection Window 2.11 Atrial Upper Rate 2.12 Preventive Overdrive Pacing (Overdrive Mode) Page 2.13 AES Detection and Pacing 2.13.1 AES Detection 2.13.2 Post AES Stimulation 2.14 Parameters for Rate-AdaptivePacing 2.14.1 Rate-Adaptation 2.14.2 Sensor Gain 2.14.3 Automatic Sensor Gain 2.14.4 Sensor Threshold 2.14.5 Rate Increase 2.14.6 Maximum Activity Rate 2.14.7 Rate Decay 2.15 Sensor Stimulation 2.16 Rate Fading 2.17 Home Monitoring (Stratos LV-T) Page 2.17.1 Transmission of Information 2.17.2 Patient Device 2.17.3 Transmitting Data Table 24: System Requirements / Recommendations System Requirements Recommendations (for Optimal Usage) 2.17.4 Types of Report Transmissions 2.17.4.2 Event Report 2.17.5 Description of Transmitted Data Heart Failure Diagnostics Ventricular Rhythm Leads System Status 2.18 Statistics 2.18.1 Timing 2.18.2 Arrhythmia 2.18.3 Sensor 2.18.4 Sensing 2.19 Interrogating and/or Starting Statistics 2.20 Timing Statistics 2.20.1 Event Counter 2.20.2 Event Episodes 2.20.3 Rate Trend 2.20.4 Atrial and Ventricular Rate Histogram 2.21 Arrhythmia Statistics 2.21.1 Tachy Episode Trend 2.21.2 AF Classification 2.21.3 AES Statistics 2.21.4 VES Statistics 2.22 Sensor Statistics 2.22.1 Sensor Rate Histogram 2.22.2 Activity Report 2.22.3 Sensor Optimization 2.23 Sensing Statistics 2.24 Pacing Statistics 3. Follow-upProcedures 3.1General Considerations Page 4. Real-TimeIEGM 4.1IEGM Recordings Page 5. Battery, Pulse and Lead Data 5.1Threshold Test - Testing the Pacing Function 5.2P/R Measurement - Testing the Sensing Function 5.3Testing for Retrograde Conduction 5.4.1 Description 5.4.2 Burst Stimulation 5.4.3 Programmed Stimulation 5.4.4 Back up Pacing 5.4.5 NIPS Safety Features Page 6. Other Functions/Features 6.1Temporary Programming 6.2Patient Data Memory 6.3Safe Program Settings 6.4Magnet Effect 6.5Position Indicator 6.6Pacing When Exposed to Interference Table 27: Response to EMI MODE EMI* (A) EMI* (V) EMI* (A+V) Page 7. Product Storage and Handling 7.1Sterilization and Storage 7.2Opening the Sterile Container Page 7.3Pulse Generator Orientation 8. Lead Connection 8.1Lead Configuration 8.2Lead Connection Page Page Page Page 9. Elective Replacement Indication (ERI) Table 29: Service Cycle Definitions Abbreviation Service Definition in Table Table 30: Stratos CRT-Psbehavior after reaching ERI Magnet Mode Cycles 1-10after After Cycle Page Table 32: Remaining Expected Service time (ERI to EOS) Pacing Program Stratos LV, (months) 10. Explantation Page 11. Technical Data 11.1 Available Pacing Modes 11.2 Pulse- and Control Parameters Page Page Page Page 11.3 Diagnostic Memory Functions 11.4 Home Monitoring (Stratos LV-T) 11.5 Additional Functions 11.6 Programmers 11.7 Default Programs 11.8 Materials in Contact with Human Tissue 11.9 Electrical Data/Battery 11.10 Mechanical Data 12. Order Information Page Appendix A Known Software Anomalies