Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0002962 (angina)
 21,142 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The data obtained by ECG-gated radionuclide angiography were collected simultaneously with right ventricular pressure and thermal cardiac output (CO) obtained by a Swan-Ganz catheter in Scintipac 1200 ( Shimazu Co) in order to create a right ventricular pressure-volume (RV P-V) loop. Subjects consisted of 15 patients with old myocardial infarction (MI group), seven with angina pectoris (AP group), six with congestive cardiomyopathy (CCM group) and five with neurocirculatory asthenia (NCA group). Right ventricular end-diastolic volume ( RVEDV ) was calculated as RVEDV = CO/(EF X HR) (CO = cardiac output; HR = heart rate). Systolic work (Ws), diastolic work (WD) and net work (WN) were calculated from a RV P-V loop by Simpson's method. The measurements were performed before and 5 min after sublingual administration of nitroglycerin (NG) (0.3 mg). The results were as follows: RV P-V loops shifted towards the left lower part of the P-V plane after sublingual administration of nitroglycerin, indicating the reduction of pressure and volume of the right ventricle. Right ventricular ejection fraction (RVEF) in the MI, AP and CCM groups showed smaller values than that of the NCA group. The CCM group presented a significantly smaller value than the NCA group (p less than 0.005). RVEF of each group increased after NG. In the AP and CCM groups, it increased significantly (p less than 0.005). Right ventricular end-diastolic volume index ( RVEDVI ) showed a converse relation with RVEF. The MI and CCM groups demonstrated significantly higher values (p less than 0.05). After NG, RVEDVI of each group decreased significantly (p less than 0.001 in the MI and NCA groups, and p less than 0.005 in the AP and CCM groups). Cardiac index in all groups decreased after NG and a statistical significance was seen in the MI, AP and NCA groups (p less than 0.05). RV Ws, RV WD and RV WN showed no difference among each group in the control state, and significantly decreased after NG. This was due to the reduction of RV pressure and volume. It was indicated that the principal cause was the systemic volume reduction. We conclude that the present method using RV P-V loop might be useful as a noninvasive bedside monitoring and permits the evaluation of RV function in a clinical setting.
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PMID:[Clinical application of a right ventricular pressure-volume loop determined by gated blood-pool imaging and simultaneously measured right ventricular pressure]. 643 Oct 16

To compare two expressions of the time constant for ventricular relaxation, 39 patients with various heart diseases (six normal, six angina pectoris [AP], 13 myocardial infarction [MI], eight hypertrophic cardiomyopathy [HCM], and six congestive cardiomyopathy [CCM]) were studied. One time constant was obtained by the method of Weiss et al. (T1) and the other was the ratio of left ventricular pressure at peak (-) dP/dt (Pm) to peak (-) dP/dt (T2). The deviation of T2 from T1 was expressed as 100 X (T2 - T1)/T1 (delta %). In normal subjects, T1 was nearly equal to T2 (32 +/- 3 and 32 +/- 6 msec, respectively), resulting in a low value of delta (-1 +/- 9). However, delta values in AP (20 +/- 23, p less than 0.05), MI (24 +/- 26, p less than 0.05), HCM (37 +/- 21, p less than 0.001), and CCM (46 +/- 24, p less than 0.001) were significantly higher than in normal subjects. Thus T1, T2, or delta separated the patient groups from the control subjects, and there were significant differences between T1 and T2 among the types of heart disease.
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PMID:Clinical characteristics of left ventricular pressure decline during isovolumic relaxation in normal and diseased hearts. 653 61

To examine the exponential nature of the left ventricular pressure (LVP) fall during isovolumic relaxation (IRP) in 59 patients (normal (N), 6; angina pectoris (AP), 13; myocardial infarction (MI), 24; and congestive (CCM, 6) and hypertrophic (HCM, 10) cardiomyopathies), LVP and dP/dt were measured by a Millar's catheter-tipped transducer. In P vs time relation during IRP was reasonably fitted by a straight line (r greater than 0.97) in all cases. Time constant (msec) in CCM (56.9 +/- 10.7), HCM (44.8 +/- 12.4) and MI (43.8 +/-7.4 higher (p less than 0.05) than in N (30.3 +/- 5.5), and peak (-) dP/dt (mmHg/sec) was lower (841 +/- 171, 1152 +/- 397 and 1270 +/- 211, respectively; p less than 0.05) than in N (1885 +/- 150), suggesting impaired LV relaxation in these groups. However, (-) dP/dt upstroke pattern was exponential only in both N and 8 of the AP. The (-) dP/dt upstroke in the remaining groups lost its exponential nature, showing rather a down ward-convex curvature which was especially prominent in CCM. This indicates non-exponential fall of LVP during IRP. Thus, the present results suggest that impaired relaxation disturbs the exponential nature of LV relaxation.
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PMID:Assessment of left ventricular relaxation in the diseased heart in man. 705 77