OBJECTIVE: To study and compare the effects of mental and physical stress on long QT syndrome (LQTS) patients. DESIGN: Case-control study. MAIN OUTCOME MEASURES: QT intervals were measured from lead V3. Serum potassium and plasma catecholamine concentrations were also monitored. PATIENTS: 16 patients with type 1 LQTS (LQT1), 14 with type 2 LQTS (LQT2), both groups asymptomatic, and 14 healthy control subjects. INTERVENTIONS: Three types of mental stress tests and a submaximal exercise stress test. RESULTS: Heart rate responses to mental stress and exercise were similar in all groups. During mental stress, the mean QT interval shortened to a similar extent in controls (-29 ms), LQT1 patients (-34 ms), and LQT2 patients (-30 ms). During exercise, the corresponding QT adaptation to exercise stress was more pronounced (p < 0.01) in healthy controls (-47 ms) than in LQT1 (-38 ms) or LQT2 patients (-38 ms). During exercise changes in serum potassium concentrations were correlated to changes in QT intervals in controls, but not in LQTS patients. LQT1 and LQT2 patients did not differ in serum potassium, catecholamine or heart rate responses to mental or physical stress. CONCLUSIONS: QT adaptation to mental and exercise stress in healthy people and in patients with LQTS is different. In healthy people QT adaptation is more sensitive to physical than to mental stress while no such diverging pattern was seen in asymptomatic LQTS patients.
OBJECTIVE: To study and compare the effects of mental and physical stress on long QT syndrome (LQTS) patients. DESIGN: Case-control study. MAIN OUTCOME MEASURES: QT intervals were measured from lead V3. Serum potassium and plasma catecholamine concentrations were also monitored. PATIENTS: 16 patients with type 1 LQTS (LQT1), 14 with type 2 LQTS (LQT2), both groups asymptomatic, and 14 healthy control subjects. INTERVENTIONS: Three types of mental stress tests and a submaximal exercise stress test. RESULTS: Heart rate responses to mental stress and exercise were similar in all groups. During mental stress, the mean QT interval shortened to a similar extent in controls (-29 ms), LQT1patients (-34 ms), and LQT2patients (-30 ms). During exercise, the corresponding QT adaptation to exercise stress was more pronounced (p < 0.01) in healthy controls (-47 ms) than in LQT1 (-38 ms) or LQT2patients (-38 ms). During exercise changes in serum potassium concentrations were correlated to changes in QT intervals in controls, but not in LQTS patients. LQT1 and LQT2patients did not differ in serum potassium, catecholamine or heart rate responses to mental or physical stress. CONCLUSIONS: QT adaptation to mental and exercise stress in healthy people and in patients with LQTS is different. In healthy people QT adaptation is more sensitive to physical than to mental stress while no such diverging pattern was seen in asymptomatic LQTS patients.
Authors: P J Schwartz; S G Priori; C Spazzolini; A J Moss; G M Vincent; C Napolitano; I Denjoy; P Guicheney; G Breithardt; M T Keating; J A Towbin; A H Beggs; P Brink; A A Wilde; L Toivonen; W Zareba; J L Robinson; K W Timothy; V Corfield; D Wattanasirichaigoon; C Corbett; W Haverkamp; E Schulze-Bahr; M H Lehmann; K Schwartz; P Coumel; R Bloise Journal: Circulation Date: 2001-01-02 Impact factor: 29.690
Authors: Neeltje M Batelaan; Adrie Seldenrijk; Odile A van den Heuvel; Anton J L M van Balkom; Antonia Kaiser; Liesbeth Reneman; Hanno L Tan Journal: Front Psychiatry Date: 2022-02-03 Impact factor: 4.157