A comparison of finger and forehead pulse oximeters in heart failure patients during maximal exercise

The objective of this study was to determine if pulse oximeter accuracy is dependent on location in heart failure patients during peak exercise.Methods20 participants with HF (7F, age 64.±11 yr) and 9 participants with coronary artery disease as controls (CAD: 3F, age 66±5 yr) performed a maximal exertion treadmill exercise stress test while wearing both finger and forehead pulse oximeters.ResultsAt peak exercise, the two pulse oximeters measurements of SpO2 differed from each other by 3.8 ± 3.3% in the HF group (p
Source: Heart and Lung: The Journal of Acute and Critical Care - Category: Respiratory Medicine Source Type: research

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Authors: Heizer J, Carbone S, Billingsley HE, van Tassell BW, Arena R, Abbate A, Canada JM Abstract BACKGROUND: Left ventricular (LV) concentric remodeling refers to a process by which increased LV relative wall thickness alters myocardial geometry, resulting in reduced LV end-diastolic volume (LVEDV) and stroke volume (SV). While the degree of concentric remodeling is a negative prognostic factor in heart failure with preserved ejection fraction (HFpEF), it is not known how it contributes to cardiorespiratory fitness (CRF). METHODS: We performed a retrospective analysis of patients with HFpEF who underwent tre...
Source: Minerva Cardioangiologica - Category: Cardiology Tags: Minerva Cardioangiol Source Type: research
Authors: Hanley SC, Melikian R, Mackey WC, Salehi P, Iafrati MD, Suarez L Abstract BACKGROUND: Veno-arterial extracorporeal membrane oxygenation (VA-ECMO) is a means of providing cardiopulmonary support that is being increasingly used in patients with acute heart failure. When ECMO cannulae are placed peripherally, their large diameters pose a risk of limb ischemia. Distal perfusion cannulae (DPC) have been proposed as means to reduce risk, but their use is not recommended by the most recent ECMO guidelines. We sought to establish their utility at our institution. METHODS: We performed a retrospective review of...
Source: International Angiology - Category: Cardiology Tags: Int Angiol Source Type: research
AbstractCardiogenic shock (CS) is a life-threatening condition of poor end-organ perfusion, caused by any cardiovascular disease resulting in a severe depression of cardiac output. Despite recent advances in replacement therapies, the outcome of CS is still poor, and its management depends more on empirical decisions rather than on evidence-based strategies. By its side, acute kidney injury (AKI) is a frequent complication of CS, resulting in the onset of a cardiorenal syndrome. The combination of CS with AKI depicts a worse clinical scenario and holds a worse prognosis. Many factors can lead to acute renal impairment in t...
Source: Heart Failure Reviews - Category: Cardiology Source Type: research
Diuretic resistance is associated with worse outcomes in acute decompensated heart failure (ADHF). Traditional dogma has held that low cardiac index (CI) is a driver of diuretic resistance by reducing renal perfusion. Recently, accumulating evidence has shown that venous congestion has a more potent effect on cardiorenal interactions than low CI. However, venous congestion also likely identifies patients with increased volume overload and the potential for a greater diuretic response.
Source: Journal of Cardiac Failure - Category: Cardiology Authors: Tags: 081 Source Type: research
AbstractIntravenous inotropic therapy can be used in patients with advanced heart failure, as palliative therapy or as a bridge to cardiac transplantation or mechanical circulatory support, as well as in cardiogenic shock. Their use is limited to increasing cardiac output in low cardiac output states and reducing ventricular filling pressures to alleviate patient symptoms and improve functional class. Many advanced heart failure patients have sinus tachycardia as a compensatory mechanism to maintain cardiac output. However, excessive sinus tachycardia caused by intravenous inotropes can increase myocardial oxygen consumpti...
Source: Heart Failure Reviews - Category: Cardiology Source Type: research
The objective of this study was to evaluate the prognostic value of MPI with D-SPECT in INOCA and obstructive coronary artery disease (CAD) patients.MethodsAll consecutive patients with suspected CAD and without prior CAD who underwent D-SPECT MPI and invasive coronary angiography within 3  months were considered. INOCA and obstructive CAD were defined as
Source: Journal of Nuclear Cardiology - Category: Nuclear Medicine Source Type: research
AbstractThe relationship between arteriovenous access flow (Qa) and cardiovascular changes is complex. Several studies have shown cardiac remodeling and symptoms of heart failure for high-flow arteriovenous fistulas (AVF). To evaluate the early cardiovascular impact of AVF. Forty-seven patients with an AVF, hospitalized for the evaluation of high-flow AVF or a pre-kidney transplant assessment were included. We collected clinical and biological data. We also collected data of the assessment by transthoracic echocardiography, functional evaluation by 6-min-walk test and peak oxygen consumption, and measurement of coronary fl...
Source: Heart and Vessels - Category: Cardiology Source Type: research
CONCLUSIONS This work provides a useful method to increase coronary perfusion and may be beneficial for improving myocardial function in patients with end-stage heart failure, especially those with ischemic cardiomyopathy (ICM). PMID: 32940255 [PubMed - in process]
Source: Medical Science Monitor - Category: Research Tags: Med Sci Monit Source Type: research
Older adults often experience progressive tandem decrements in cognitive and physical functioning that threaten their independence and quality-of-life (QOL).1,2 The severity of loss in QOL and overall functional ability varies, depending on interactions between aging and comorbid disease processes. Heart failure (HF) is among the most common systemic comorbidities of older adulthood. Given the highly vascularized nature of the brain and systemic effects of HF, particularly on cerebral perfusion, cognitive impairment (CI), may be a key, but clinically underrecognized, feature of HF.
Source: Journal of Cardiac Failure - Category: Cardiology Authors: Source Type: research
Conclusions-Submaximal exercise elicited a greater accumulation of lung fluid in HFpEF compared to controls, and lung fluid content was negatively correlated with lung diffusing capacity and alveolar-capillary membrane conductance in HFpEF. PMID: 32936678 [PubMed - as supplied by publisher]
Source: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology - Category: Physiology Authors: Tags: Am J Physiol Regul Integr Comp Physiol Source Type: research
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