Hemodynamic findings in heart block with slow ventricular rates

Levinson, David C.; Shubin, Herbert; Gunther, Lewis; Meehan, John P.

doi:10.1016/0002-9149(59)90164-x

Cited by 31 publications

(10 citation statements)

References 10 publications

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14] There is general agreement that irrespective of the etiology of the block, cardiac enlargement and increased stroke volume are the compensatory mechanisms for the slow rate. In a few studies ventricular rate and other hemodynamic changes have been followed during exercise.1-3' [13][14][15] The prevailing opinion is that in patients with the congenital form of complete heart block the ventricular rate increases more readily than in patients with the acquired form of the arrhythmia.…”

mentioning

confidence: 99%

Response to Exercise in Congenital Complete Atrioventricular Block

Ikkos¹,

Hanson²

1960

Circulation

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The electrocardiographic and hemodynamic responses to graded exercise in 11 patients with congenital complete atrioventricular block are described. Ventricular rate increases during exercise were unrelated to the resting rate, atrial rate, or heart size. Changes in the ratio of atrial: ventricular rates were observed in all cases during physical work. Physical working capacity was normal or only slightly reduced in all instances. This is accomplished through maintenance of normal minute volumes, which in turn reflects an interplay of several factors: acceleration of ventricular rate, increased heart volume and stroke volume, and a normal or supernormal oxygen-transporting capacity of the blood as reflected in increased amount of total hemoglobin.

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mentioning

confidence: 99%

Response to Exercise in Congenital Complete Atrioventricular Block

Ikkos¹,

Hanson²

1960

Circulation

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“…and L evinson ct al. [19], and also generally elevated in the series by Stack ct al. [20] and Benchimol ct al.…”

Section: Discussionmentioning

confidence: 71%

Cardiovascular Dynamics in Man During Idioventricular Rhythm and at Various, Electrically Determined, Ventricular Rates in, Acquired Complete Heart Block at Rest

Bentivoglio¹,

Geczy²,

Menéndez³

et al. 1969

Cardiology

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“…Cardiac output is reduced despite an increased stroke volume. 18 19 With ventricular pacing, resting right heart pressures fall, cardiac output increases, and stroke volume falls.5' Judge et al measured the effect of different pacing rates on cardiac output. Increasing heart rate from 60 to 75 beats per minute caused a 7% increase in cardiac output; there was little or no benefit from faster rates.20 Since cardiac output had not been measured in the unpaced state, the effect of pacing remained uncertain.…”

Section: Discussionmentioning

confidence: 99%

“…tients2,8,11,19, and 21 had chronic airways obstruction. Patient 9 had mild aortic valve regurgitation.…”

mentioning

confidence: 99%

Ventricular pacing improves exercise tolerance in patients with chronic heart block.

Papouchado¹,

Pitcher²

1986

Heart

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Exercise capacity was assessed by means of a simple six minute walking test in a group of 18 patients with heart block whose only presenting symptom was breathlessness. None was in overt cardiac failure. Patients were studied before and after implantation of a transvenous, ventricular, demand pacing system (study group). Eight patients with an implanted pacemaker admitted for elective generator replacement were assessed in the same manner (control group). Exercise capacity in the study group was significantly increased within 48 hours of pacing, and this improvement was maintained in most patients during the follow up period of up to 30 months. In contrast, exercise capacity was unaffected by generator replacement in the control group. Simple ventricular pacing produces symptomatic benefit in patients with heart block accompanied by breathlessness. This benefit is apparent within 48 hours of pacing and is maintained; it can be assessed objectively by a six minute walking test.

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Hemodynamic findings in heart block with slow ventricular rates

Cited by 31 publications

References 10 publications

Response to Exercise in Congenital Complete Atrioventricular Block

Response to Exercise in Congenital Complete Atrioventricular Block

Cardiovascular Dynamics in Man During Idioventricular Rhythm and at Various, Electrically Determined, Ventricular Rates in, Acquired Complete Heart Block at Rest

Ventricular pacing improves exercise tolerance in patients with chronic heart block.

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