Premium
PRESSURE‐VOLUME RELATIONSHIPS IN THE LEFT ATRIA OF ANAESTHETIZED DOGS
Author(s) -
Fahim M.
Publication year - 1978
Publication title -
clinical and experimental pharmacology and physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 103
eISSN - 1440-1681
pISSN - 0305-1870
DOI - 10.1111/j.1440-1681.1978.tb00710.x
Subject(s) - left atrium , saline , atrium (architecture) , cardiology , volume (thermodynamics) , pulmonary artery , central venous pressure , blood pressure , left atrial pressure , pressure wave , anesthesia , medicine , heart rate , mechanics , atrial fibrillation , physics , quantum mechanics
SUMMARY 1. Pressure‐volume relationships of the left atria were studied in thoracotomized dogs anaesthetized with sodium pentobarbitone and ventilated artificially. Controlled volumes of saline were injected into the left atrium using a method by which the injections were triggered by the R wave of the normal ECG, during the period of the V wave of the left atrial pressure waveform. 2. The change in the amplitude of the V wave was found to be linearly related to the injected volume. Similar observations made while the pulmonary artery was occluded revealed that this linearity in the pressure‐volume relationship of the atrium extended down to small volumes.