Ventriculo-atrial gradient due to first degree atrio-ventricular block: a case report

BACKGROUND: Isolated, asymptomatic first degree AV block with narrow QRS has not prognostic significance and is not usually treated with pacemaker implantation. In some cases, yet, loss of AV synchrony because of a marked prolongation of the PR interval may cause important hemodynamic alterations, with subsequent symptoms of heart failure. Indeed, AV synchrony is crucial when atrial systole, the "atrial kick", contributes in a major way to left ventricular filling, as in case of reduced left ventricular compliance because of aging or concomitant structural heart disease. CASE PRESENTATION: We performed a trans-septal left atrium catheterization aimed at evaluating the entity of a mitral valve stenosis in a 72-year-old woman with a marked first-degree AV block, a known moderate aortic stenosis and NYHA class III symptoms of functional deterioration. We occurred in a deep alteration in cardiac hemodynamics consisting in an end-diastolic ventriculo-atrial gradient without any evidence of mitral stenosis. The patient had a substantial improvement in echocardiographic parameters and in her symptoms of heart failure after permanent pacemaker implantation with physiological AV delay. CONCLUSION: We conclude that if a marked first degree AV block is associated to instrumental signs or symptoms of heart failure, the restoration of an optimal AV synchrony, achieved with dual-chamber pacing, may represent a reasonable therapeutic option leading to a consequent clinical improvement

Capitalism and the sea: Sovereignty, territory and appropriation in the global ocean

This paper introduces the term ‘terraqueous territoriality’ to analyse a particular relationship between capitalism as a social formation, and the sea as a natural force. It focuses on three spaces – exclusive economic zones (EEZs), the system of ‘flags of convenience’ (FOC), and multilateral counter-piracy initiatives – as instances of capitalist states and firms seeking to transcend the geo-physical difference between firm land and fluid sea. Capital accumulation, it is argued here, seeks to territorialise the sea through forms of sovereignty and modes of appropriation drawn from experiences on land, but in doing so encounters particular tensions thereby generating distinctive spatial effects. By exploring the articulation between sovereignty, territory and appropriation in the organisation of spaces where land meets sea, the article seeks to demonstrate the value of an analytical framework that underlines the terraqueous nature of contemporary capitalism

The Determinants of International Migration in Early Modern Europe: Evidence from the Maritime Sector, c. 1700–1800

This paper offers the first multivariate regression study of international migration in earlymodern Europe. Using unique eighteenth-century data about maritime workers, we created adata set of migration flows among European countries to examine the role of factors related togeography, population, language, the market and chain migration in explaining the migrationof these workers across countries. We show that among all factors considered in ourmultivariate analysis, the geographical characteristics of the destination countries, size of porttowns, and past migrations are among the most robust and quantitatively the most importantfactors influencing cross-country migration flows

Margarita de Sossa, Sixteenth-Century Puebla de los Ángeles, New Spain (Mexico)

Margarita de Sossa’s freedom journey was defiant and entrepreneurial. In her early twenties, still enslaved in Portugal, she took possession of her body; after refusing to endure her owner’s sexual demands, he sold her, and she was transported to Mexico. There, she purchased her freedom with money earned as a healer and then conducted an enviable business as an innkeeper. Sossa’s biography provides striking insights into how she conceptualized freedom in terms that included – but was not limited to – legal manumission. Her transatlantic biography offers a rare insight into the life of a free black woman (and former slave) in late sixteenth-century Puebla, who sought to establish various degrees of freedom for herself. Whether she was refusing to acquiesce to an abusive owner, embracing entrepreneurship, marrying, purchasing her own slave property, or later using the courts to petition for divorce. Sossa continued to advocate on her own behalf. Her biography shows that obtaining legal manumission was not always equivalent to independence and autonomy, particularly if married to an abusive husband, or if financial successes inspired the envy of neighbors

A Turke turn'd Quaker: conversion from Islam to radical dissent in early modern England

The study of the relationship between the anglophone and Islamic worlds in the seventeenth century has been the subject of increas- ing interest in recent years, and much attention has been given to the cultural anxiety surrounding “Turning Turke”, conversion from Christianity to Islam, especially by English captives on the Barbary coast. Conversion in the other direction has attracted far less scrutiny, not least because it appears to have been far less com- mon. Conversion from Islam to any form of radical dissent has attracted no scholarship whatsoever, probably because it has been assumed to be non-existent. However, the case of Bartholomew Cole provides evidence that such conversions did take place, and examining the life of this “Turke turn’d Quaker” provides an insight into the dynamics of cross-cultural conversion of an exceptional kind

Strategic and institutional effects on foreign IPO performance : Examining the impact of country of origin, corporate governance, and host country effects

By integrating signaling research with an institutional perspective we examine how country of origin, corporate governance, and host market effects impact foreign IPO performance. Using a sample of 202 foreign IPOs listed in the U.S. or U.K in 2002-2007 results indicate both the legal environment surrounding these organizations in their countries of origin and board independence impact the success of foreign firms at IPO. However, the institutional environment of the chosen IPO market impacts the salience of country and corporate governance signals for foreign IPO firms suggesting a more contextualized framework of IPO valuation is necessary

Accounting, slavery and social history: The legacy of an eighteenth-century Portuguese chartered company

Based on extensive archival research, this study documents and analyses the accounting techniques that the Companhia Geral do Grão Pará e Maranhão applied to its slave trading operations during the second half of the eighteenth century. The surviving accounting records of this Portuguese chartered company reveal – in meticulous detail – the integral role that accounting technology played in enabling the slave trade to flourish. However, and paradoxically, while evidencing this culpability the same accounting records also document the essential humanity of the slaves and preserve details of the bleak circumstances of their existence. Slaves are typically lamented as a lost people consigned to a tragic and an eternal anonymity, but it is from accounting records that many aspects of their lives can be reconstructed. In this way, the accounting records studied are also shown to provide a latent source of social history that constitutes a profound mea culpa. © 2017, © The Author(s) 2017