Abstract:
:Except for the unique eccentricities of individual devices, most dual-chamber paced rhythms, both normal and abnormal, are readily understood and lend themselves to analysis if the programmed parameters are known. Although they may appear intimidating, this need not be the case if the physician is initially willing to devote both time and effort to understanding them. Learning is not a passive exercise. It is therefore suggested that when the patient is clearly stable and doing well and there is no active concern about a possible pacing system malfunction, the physician should obtain and carefully analyze selected tracings. This analysis should include the diagramming of all pertinent intervals (atrial escape interval, AV delay interval, maximum tracking rate interval, postventricular atrial refractory period, blanking period, and ventricular refractory period) by placing these cycles under the respective P and R waves and atrial and ventricular pacing pulses on the selected rhythm strips. Then, if something does not appear to fit or make sense, a colleague or the manufacturer can be contacted for clarification. These exercises will help develop one's ability to handle these rhythms. This exercise is preferable to first attempting such an analysis when presented with a patient in whom a problem is already suspected. Despite this effort, confusing rhythms will occasionally be encountered. In these cases, the added features of telemetry, enabling interrogation of programmed and measured data (see Fig. 30), endocardial electrograms (see Fig. 2), and generation of marker pulses are proving to be extremely valuable in the rapid and accurate assessment of the more complex pacemaker rhythms.
journal_name
Cardiol Clinjournal_title
Cardiology clinicsauthors
Levine PAsubject
Has Abstractpub_date
1985-11-01 00:00:00pages
595-616issue
4eissn
0733-8651issn
1558-2264journal_volume
3pub_type
杂志文章,评审abstract::Systemic hypertension is a major public health problem and is perhaps the most common chronic disorder in most societies. Most patients with vascular disease report hypertension in their medical history. Irrespective of the specialty that one practices, every physician will likely encounter patients with systemic hype...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(01)00008-x
更新日期:2002-05-01 00:00:00
abstract::Implantable cardioverter-defibrillators (ICDs) improve survival in patients who have left ventricular dysfunction; however, they are associated with numerous problems at implant and during follow-up. The diagnosis and management of these problems is usually straightforward, but more difficult problems may include the ...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2008.03.012
更新日期:2008-08-01 00:00:00
abstract::Proarrhythmia is a potentially lethal adverse effect of antiarrhythmic drugs. Underlying mechanisms and the approaches to identification are discussed. The applicability of electrophysiologic testing is considered, with particular reference to the validity of the different responses to programmed stimulation considere...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1986-08-01 00:00:00
abstract::In this era of interventional electrophysiology, the accuracy of the electrocardiogram in diagnosis of supraventricular tachycardia could be improved by detailed endocardial mapping and confirmed by results of radiofrequency catheter ablation. This article describes the electrocardiographic characteristics for differe...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70361-1
更新日期:1997-11-01 00:00:00
abstract::Mechanical circulatory support using left ventricular assist devices (LVAD) has become an accepted mode of therapy for both bridging patients with end-stage heart failure to transplant and as a destination therapy. Right ventricular (RV) dysfunction is common after LVAD insertion and is a significant source of morbidi...
journal_title:Cardiology clinics
pub_type: 杂志文章
doi:10.1016/j.ccl.2011.08.011
更新日期:2011-11-01 00:00:00
abstract::This article briefly reviews the background and rationale for the development of polymer paving. The process of endoluminal paving is described both in its generic form as well as in three experimental embodiments. Several experimental studies with two forms of paving, solid paving and gel paving, are reviewed. Finall...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1994-11-01 00:00:00
abstract::The overall management and prognosis of patients with acute myocardial infarction must take into account not only infarct size but also the site and locus of involvement as determined by electrocardiography. Transmural versus nontransmural infarction is discussed in relation to therapy and prognosis. ...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1984-02-01 00:00:00
abstract::Congenital abnormalities of the pericardium are a rare group of disorders that include congenital absence of the pericardium, pericardial cysts, and diverticula. These congenital defects result from alterations in the embryologic formation and structure of the pericardium. Although many cases are incidentally found, t...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2017.07.012
更新日期:2017-11-01 00:00:00
abstract::During the past decade, ambulatory monitoring of the blood pressure has become an important tool for evaluating the pharmacodynamics and clinical efficacy of antihypertensive drugs during development. Furthermore, this methodology aids physicians in practice in the assessment of blood pressure control in many subsets ...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1995-11-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(02)00013-9
更新日期:2002-08-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70213-7
更新日期:2001-05-01 00:00:00
abstract::Significant advances have been made in understanding the pathogenesis and clinical physiology of primary hypertension. This article presents an overview of the physiology of normal blood pressure control and the pathophysiologic mechanisms that predispose individuals and populations to primary hypertension. The role o...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2010.07.001
更新日期:2010-11-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2013.07.008
更新日期:2013-11-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70098-9
更新日期:1999-08-01 00:00:00
abstract::Atrial fibrillation (AF) is the most prevalent heart rhythm disorder. AF accounts for a great proportion of deaths because it independently increases all-cause mortality and cardiovascular mortality risks. Ischemic stroke is the most common cardiovascular adverse event in AF patients. Oral anticoagulation (OAC) therap...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2015.12.006
更新日期:2016-05-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2010.01.007
更新日期:2010-05-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70330-1
更新日期:1997-05-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70012-6
更新日期:1998-05-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(02)00089-9
更新日期:2002-11-01 00:00:00
abstract::Although it is convenient to think of hypertension in its renal, epidemiologic, and vascular eras, a new perspective is rapidly coming to the forefront. As we become more critical in evaluating the performance of our health care systems, it is obvious that the major problems in hypertension do not lie entirely with un...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1995-11-01 00:00:00
abstract::Valvular heart disease (VHD) is generally well tolerated during pregnancy; however, the dramatic changes in hemodynamics that occur during pregnancy can lead to clinical decompensation in high-risk women. Women with VHD considering pregnancy should undergo preconception counseling with a high-risk obstetrician and car...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2020.09.010
更新日期:2021-02-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1988-02-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2020.04.004
更新日期:2020-08-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 历史文章,杂志文章
doi:10.1016/s0733-8651(02)00133-9
更新日期:2003-02-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章
doi:
更新日期:1984-11-01 00:00:00
abstract::One hundred years ago, Augustus Desiré Waller recorded the human electrocardiogram for the first time, using a capillary electrometer. Electrocardiography only became clinically relevant in 1901 when Willem Einthoven devised his string galvanometer for this purpose. Sir Thomas Lewis was the key figure in showing the v...
journal_title:Cardiology clinics
pub_type: 传,历史文章,杂志文章
doi:
更新日期:1987-08-01 00:00:00
abstract::This article discusses the epidemiology of cardiovascular (CV) events in end-stage and early renal disease, summarizes the profile of classic and nonclassic CV risk factors in renal patients, highlights recent evidence documenting accelerated atherogenesis in renal disease, and provides information on the central arte...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2005.03.002
更新日期:2005-08-01 00:00:00
abstract::The goal of anticoagulant therapy in unstable angina is to prevent progression of a subocclusive coronary thrombus to complete occlusion of the coronary artery, thereby preventing myocardial infarction and death. Although these have been many advances in therapy with anticoagulants, considerable morbidity and mortalit...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/s0733-8651(05)70078-3
更新日期:1999-05-01 00:00:00
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journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:
更新日期:1992-11-01 00:00:00
abstract::Atrial septal defects (ASDs) can be complicated by cardioembolic strokes, but the exact incidence is unknown. Patients with large and small shunts may present with a cardioembolic stroke. Patients with cryptogenic strokes should have cardiac ultrasound to see if an ASD is present. Cardioembolic strokes associated with...
journal_title:Cardiology clinics
pub_type: 杂志文章,评审
doi:10.1016/j.ccl.2015.12.004
更新日期:2016-05-01 00:00:00