Pv-loop Catheter
Pv-loop Catheter - Related Videos
08:15
Cardiac Pressure-Volume Loop Analysis Using Conductance Catheters in Mice
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Cited by 33 •
2015
Cardiac pressure-volume loop analysis is the most comprehensive way to measure cardiac function in the intact heart. We describe a technique to perform and analyze cardiac pressure volume loops, using conductance catheters.
17:15
Catheterization of Intestinal Loops in Ruminants
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Cited by 4 •
2009
We describe a novel surgical method for catheterizing 'intestinal loops' within the ileum of sheep. Once animals have recovered from surgery and have cleared antibiotics and analgesics, multiple treatments can be deposited directly in loops via the catheters.
01:18
pV-Diagrams
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2025
The pV diagram, which is a graph of pressure versus volume of the gas under study, is helpful in describing certain aspects of the substance. When the substance behaves like an ideal gas, the ideal gas equation describes the relationship between its pressure and volume. On a pV diagram, it is common to plot an isotherm, which is a curve showing p as a function of V with the number of molecules and the temperature fixed. Then, for an ideal gas, the product of the pressure of the gas and its...
11:39
Peripheral Intravenous Catheter Insertion
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2023
Source: Madeline Lassche, MSNEd, RN and Katie Baraki, MSN, RN, College of Nursing, University of Utah, UT The purpose of peripheral intravenous catheter (PIV) insertion is to infuse medications, perform intravenous (IV) fluid therapy, or inject radioactive tracers for special examination procedures. Placing a PIV is an invasive procedure and requires the use of an aseptic, no-touch technique. Common IV venipuncture sites are the arms and hands in adults and the feet in children. According to...
09:15
Measuring Pressure Volume Loops in the Mouse
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Cited by 16 •
2016
This manuscript describes a detailed protocol for the collection of pressure-volume data from the mouse.
FAQs
The pressure transducer records chamber pressure while electrical conductance electrodes estimate chamber volume at the same time. These measurements change continuously throughout the cardiac cycle, allowing the system to pair pressure and volume at successive moments. The resulting relationship provides information about ventricular performance that cannot be obtained from pressure measurements alone.
PV-loop analysis can reveal contractility, preload, afterload, stroke work, and ventricular-arterial coupling. Together, these measures describe how strongly the ventricle contracts, how filling and resistance affect its workload, and how ventricular performance relates to the arterial system. This broader assessment helps characterize cardiac mechanics under different physiological or treatment conditions.
Conventional blood-pressure measurements describe pressure, whereas PV-loop recording relates pressure to chamber volume across the cardiac cycle. That combined view supports assessment of ventricular function, workload, and the interaction between the ventricle and arterial system. Consequently, investigators can examine cardiac mechanics and treatment effects rather than relying on blood pressure as the sole hemodynamic measure.
The catheter is introduced through a blood vessel and positioned to record within a cardiac chamber. Its pressure transducer measures chamber pressure, while conductance electrodes estimate instantaneous volume. The recorded signals are then combined across the cardiac cycle to generate pressure-volume loops, which can be examined for changes in ventricular performance and hemodynamic behavior.
Researchers use PV-loop measurements to investigate heart failure, cardiac mechanics, and the hemodynamic effects of drugs or devices. The method can show how an intervention changes ventricular performance and pressure-volume behavior. It therefore supports experimental evaluation of treatment strategies that aim to alter cardiac function, rather than simply documenting a single blood-pressure value.
By measuring pressure and estimated volume throughout the cardiac cycle, PV-loop analysis provides outcome measures linked to contractility, preload, afterload, stroke work, and ventricular-arterial coupling. Investigators can use these measures to assess how drugs, devices, or other treatment strategies influence ventricular mechanics. This makes the technique relevant to comparative studies of cardiac interventions.