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The first appearance of the blues is often dated to after the ending of slavery, with the development of juke joints occurring later. It is associated with the newly acquired freedom of the former slaves. Chroniclers began to report about blues music at the dawn of the 20th century. The first publication of blues sheet music was in 1908.
Blues is a music genre [3] and musical form that originated amongst African-Americans in the Deep South of the United States around the 1860s. [2] Blues has incorporated spirituals, work songs, field hollers, shouts, chants, and rhymed simple narrative ballads from the African-American culture.
Agonal heart rhythm is usually ventricular in origin. Occasional P waves and QRS complexes can be seen on the electrocardiogram. The complexes tend to be wide and bizarre in morphological appearance. [1] Clinically, an agonal rhythm is regarded as asystole and should be treated equivalently, with cardiopulmonary resuscitation and administration ...
American singers and musicians who grew up listening to the electric blues by artists such as Muddy Waters, [2] Jimmy Reed, and Elmore James, and soul singers such as Sam Cooke, Ray Charles [3] and Otis Redding [4] fused blues and soul music. [1] Bobby Bland was one of the pioneers of this style. [1]
The twelve-bar blues (or blues changes) is one of the most prominent chord progressions in popular music. The blues progression has a distinctive form in lyrics, phrase, chord structure, and duration. In its basic form, it is predominantly based on the I, IV, and V chords of a key.
An idioventricular rhythm is a cardiac rhythm characterized by a rate of <50 beats per minute (bpm), absence of conducted P waves and widening of the QRS complex. [1] In cases where the heart rate is between 50 and 110 bpm, it is known as accelerated idioventricular rhythm and ventricular tachycardia if the rate exceeds 120 bpm.
The sixteen-bar blues can be a variation on the standard twelve-bar blues or on the less common eight-bar blues. Sixteen-bar blues is also used commonly in ragtime music. [ 1 ]
By the mid-1950s, rhythm and blues was transitioning from its blues and big band-based jazz origins toward the musical forms that would be known more broadly as rock music. [2] [nb 2] This trend was expedited by the exposure of young white listeners and musicians to African-American music played by ambitious disc jockeys on radio stations in the Northern United States. [2]