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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 2
Jon-Emile S. Kenny MD [@heart_lung] In part 1, right atrial pressure [Pra] and cardiac output/venous return [CO/VR] were considered as two hemodynamic…
Nov 18, 2023
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 2
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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 1
Jon-Emile S. Kenny MD [@heart_lung] It is axiomatic that association is not causation. Sometimes, however, this principle is lost in the fuliginous fog…
Nov 11, 2023
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: The Right Atrial Pressure Does Not Determine Cardiac Output – Part 1
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ICU Physiology in 1000 Words: Phenylephrine Pushes & Stroke Volume
Jon-Emile S. Kenny MD [@heart_lung] About a decade ago, a handful of terrific reviews and investigations about phenylephrine – an alpha1 agonist – were…
Nov 11, 2021
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: Phenylephrine Pushes & Stroke Volume
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ICU Physiology in 1000 Words: The Geometry of Ejection Fraction
Jon-Emile S. Kenny MD [@heart_lung] The left ventricular ejection fraction [LVEF] is a commonly-sought cardiac measure. With the explosion of bedside…
Sep 23, 2021
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: The Geometry of Ejection Fraction
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ICU Physiology in 1000 Words: The Pulse
Jon-Emile S. Kenny MD [@heart_lung] The relative simplicity of extending one’s finger onto the tissue overlaying a major artery belies the complicated…
Sep 13, 2021
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: The Pulse
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ICU Physiology in 1000 Words: Pulmonary Vascular Resistance & Linear Assumptions
Jon-Emile S. Kenny MD [@heart_lung] A recent review of Paul Wood’s consummate approach to pulmonary hypertension is well-worth a read [1]. In it, the…
Nov 11, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: Pulmonary Vascular Resistance & Linear Assumptions
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ICU Physiology in 1000 Words: On Venous Capacitance and the U.S. Election
Jon-Emile S. Kenny MD [@heart_lung] Administering norepinephrine during sepsis resuscitation has a myriad of hemodynamic effects [1]. Importantly, the…
Oct 30, 2020
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Jon-Emile S. Kenny
1
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ICU Physiology in 1000 Words: On Venous Capacitance and the U.S. Election
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ICU Physiology in 1000 Words: The Diastolic Shock Index & Subendocardial Perfusion
Jon-Emile S. Kenny MD [@heart_lung] When we model the circulation at the bedside, we resort to generalizations. While these mechanistic heuristics don’t…
Oct 10, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: The Diastolic Shock Index & Subendocardial Perfusion
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ICU Physiology in 1000 Words: Cardiothoracic Uncoupling & Venous Ergotrauma
Jon-Emile S. Kenny MD [@heart_lung] Pulmonary Elastic Ergotrauma There are hidden hemodynamics in respiratory mechanics, as previously discussed. Recall…
Aug 18, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: Cardiothoracic Uncoupling & Venous Ergotrauma
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ICU Physiology in 1000 Words: Patient Self-Inflicted Lung Injury – Part 2
Jon-Emile S. Kenny MD [@heart_lung] In part 1, evidence for and against spontaneous breathing effort in acute respiratory distress syndrome [ARDS] was…
Jul 30, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: Patient Self-Inflicted Lung Injury – Part 2
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ICU Physiology in 1000 Words: Patient Self-Inflicted Lung Injury – Part 1
Jon-Emile S. Kenny MD [@heart_lung] Background In an excellent review from early 2016, Gattinoni and Quintel note that ventilator induced lung injury…
Jul 30, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: Patient Self-Inflicted Lung Injury – Part 1
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ICU Physiology in 1000 Words: All Perfusion Is Local
Jon-Emile S. Kenny MD [@heart_lung] About a year ago, I explored blood pressure – underscoring mean arterial pressure [MAP] as a determinant, but not…
Mar 9, 2020
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Jon-Emile S. Kenny
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ICU Physiology in 1000 Words: All Perfusion Is Local
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