Isolation and characterization of single canine cardiac purkinje cells.
Population
Single canine cardiac Purkinje cells
Comparison
Isolation method and electrophysiological… vs Intact Purkinje fibers
Design
Preclinical
Authors
Discussion
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Implication
Does not alter clinical care; extends validated single-cell models for Purkinje electrophysiology.
Key Points
- To isolate single canine cardiac Purkinje cells and analyze their electrophysiological properties.
- Developed a method for isolating single canine Purkinje cells.
- Utilized single and double microelectrode techniques for electrophysiological studies.
- Performed measurements at 22 degrees C to assess membrane potential and action potentials.
- Single Purkinje cells exhibited a peak mean upstroke velocity (Vmax) of 167 V/sec at approximately -70 mV.
- Maximal overshoot of action potential was around +30 mV; mean membrane input resistance was 21 M omega and capacitance was 360 pF.
- Electrical properties of isolated Purkinje cells were similar to those of intact Purkinje fibers.
Structured PICO
P
Population
Single canine cardiac Purkinje cells
I
Intervention
Isolation method and electrophysiological characterization using conventional single and double microelectrode techniques
C
Comparator
Intact Purkinje fibers (historical/implied comparison)
O
Outcome
Basic electrophysiological properties (resting membrane potential, action potential upstroke velocity, overshoot, membrane input resistance, membrane capacitance)surrogate
The study demonstrates a successful method for isolating single canine cardiac Purkinje cells that retain normal electrical properties, providing a useful model for detailed electrophysiological experiments.
Cite This Study
Sheets et al. (1983) studied this question.