Pacing in Demand Mode
9650-001355-01 Rev. M
X Series Operator’s Guide
18-5
8 Determine Capture
It is important to recognize when pacing stimulation has produced a ventricular response
(capture). Determination of capture must be assessed both electrically and mechanically in
order to ensure appropriate circulatory support of the patient.
Electrical capture is determined by the presence of a widened QRS complex, the loss of any
underlying intrinsic rhythm, and the appearance of an extended, and sometimes enlarged,
T-wave.
Ventricular response is normally characterized by suppression of the intrinsic QRS complex.
WARNING! Determination of electrical capture should only be performed by viewing the ECG trace
on the X Series display with its ECG connection directly attached to the patient. Use of
other ECG monitoring devices might provide misleading information due to the
presence of pacer artifacts.
Mechanical capture is assessed by palpation of the peripheral pulse.
To avoid mistaking muscular response to pacing stimuli for arterial pulsations, use ONLY the
following locations for palpating pulse during pacing:
•
femoral artery
•
right brachial or radial artery
Effective pacing
Changing ECG leads and size can sometimes be helpful in determining capture.
Note:
The shape and size of the paced ECG waveforms can vary depending on the ECG lead
configuration chosen; variation from patient to patient can be expected.
9 Determine Optimum Threshold
The ideal pacer current is the lowest value that maintains capture — it is usually about 10%
above threshold. Typical threshold currents range from 40 to 80 mA. Location of the hands-free
or therapy electrodes affects the current required to obtain ventricular capture. Typically the
lowest threshold is obtained when the position of the electrodes provides the most direct current
pathway through the heart while avoiding large chest muscles. Lower stimulation currents
produce less skeletal muscle contraction and are better tolerated.
Содержание X Series
Страница 1: ...Includes Real CPR Help and See Thru CPR X Series Operator s Guide 9650 001355 01 Rev M...
Страница 64: ...Chapter 2 Product Overview 2 24 www zoll com 9650 001355 01 Rev M...
Страница 74: ...Chapter 3 Monitoring Overview 3 10 www zoll com 9650 001355 01 Rev M...
Страница 80: ...Chapter 4 Trends 4 6 www zoll com 9650 001355 01 Rev M...
Страница 90: ...Chapter 5 Alarms 5 10 www zoll com 9650 001355 01 Rev M...
Страница 110: ...Chapter 7 Monitoring Respiration Resp and Heart Rate HR 7 10 www zoll com 9650 001355 01 Rev M...
Страница 126: ...Chapter 8 Monitoring Non Invasive Blood Pressure NIBP 8 16 www zoll com 9650 001355 01 Rev M...
Страница 156: ...Chapter 10 Pulse CO Oximetry SpO2 10 18 www zoll com 9650 001355 01 Rev M...
Страница 166: ...Chapter 11 Monitoring Invasive Pressures IBP 11 10 www zoll com 9650 001355 01 Rev M...
Страница 198: ...Chapter 14 12 Lead ECG Interpretive Analysis 14 16 www zoll com 9650 001355 01 Rev M...
Страница 218: ...Chapter 16 Advisory Defibrillation 16 6 www zoll com 9650 001355 01 Rev M...
Страница 224: ...Chapter 17 Analysis CPR Protocol Defibrillation 17 6 www zoll com 9650 001355 01 Rev M...
Страница 234: ...Chapter 18 External Pacing 18 10 www zoll com 9650 001355 01 Rev M...
Страница 242: ...Chapter 19 Real CPR Help 19 8 www zoll com 9650 001355 01 Rev M...
Страница 254: ...Chapter 21 Patient Data 21 6 www zoll com 9650 001355 01 Rev M...
Страница 338: ...Specifications A 38 www zoll com 9650 001355 01 Rev M...